Question
Hi, we have a 2016 Forest River Rockwood Signature Ultra Lite fifth wheel, and I cannot for the life of me get the pilot light to relight. It’s a Suburban gas furnace. We live in South Carolina and the nearest dealer is 55 miles away. Help!
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Answer
Hi there, thanks for the question. This model does not actually have a “pilot light,” but rather a direct spark ignition (DSI) that ignites the flame. When the temperature get down to the specified low, the gas valve opens and LP or liquid propane flows through an orifice to the burner assembly. The spark igniter sends a spark to ignite the flame similar to a manual spark or Piezo in a residential gas grill.
If your furnace is not starting, you will need to look at the following items:
- 1. House battery power. The furnace needs at least 10.5 volts DC and sometimes more to open the valve. This must be checked at the module board with a multimeter.
- 2. Blown fuse. There is a 12-volt fuse in the distribution center and sometimes an inline fuse in the module board on the furnace. Verify they are in working order.
- 3. Correct LP pressure. Do the stove top and other LP appliances work correctly?
Here are some other questions and troubleshooting ideas:
- • Does the blower run, but the furnace does not light? If so, this is usually a low 12-volt issue as the blower will run under 10.5 volts
- • Do you hear the spark igniter trying to light? If you hear a clicking sound, the igniter is working but there is no gas or it has a cracked ceramic housing and is carbon cracking which means the spark is not “jumping” to the burner tube, rather following the crack to ground.
- • Another issue could be the thermostat. You can jump the wires to bypass the thermostat to see if it starts.
A lot of things to try here. Let us know if any of this works or if you have any more questions. Good luck!
Safe travels,
David Solberg
Related:
Understanding the Fuse Panel of an RV Distribution Panel
RV Battery Maintenance: Checking Battery Charge
How an RV Propane Tank Pressure Regulator Works
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Hello Grace,
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My brand new (in 2017) fifth wheel with a suburban furnace had a different problem that neither the local dealer nor Suburban seemed to know about. The furnace would not light above about 7,000 ft elevation. I did several test runs to verify that this was an elevation issue. The stove burners, oven and hot water heater all worked fine. The furnace DSI would click and there was enough gas pressure. Luckily, the trailer manufacturer had a service rep that had encountered this issue previously. He indicated that the spark gap needed to be increased. Neither the local dealer nor Suburban were willing to agree to widening the spark gap. Unfortunately the manufacturer was 1200 miles away and widening the gap would require removing the furnace from the trailer. I finally managed to get all parties together on a phone call where the dealer agreed to widen the gap -for a typical furnace service fee. After agreeing to pay the fee myself and requesting that the dealer record the before/after gap dimensions the dealer performed the service. The furnace has started ever since. Unfortunately, the dealer did not record the gap dimensions, nor have I purchased anything from that dealer since.
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Customer Service RV Repair Club
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I started my furnace in heating mode and it ran for approx 5 minutes and then there was 2 booms . Were these gas explosions. Also I ran the heater the day before with no issues. could this be related to a low house battery charge?
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I live in an older model thor camper that belongs to my daughter and son in law. Don’t know what year model it is. Got the propane hooked up yesterday and after a really long time working on it finally got it to light so I can get hot water. HeaTed it for a while, then the burner shut off. Problem is the burner will not relight. Pilot is lit but that’s it. Have no hot water. I have no idea what to do from here. Help please?
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Sarah
RV Repair Club Video Membership
my furnace ignities but ony will run for about 10 mins then shuts down and will not restart until u turn it off and then it will run again about 10 mins. new battery sail swith limt switch control board and switch the t stats around in rig and still does the same thing. what else would cause this?
Hello David. If it tries to reignite after shutting down, either the gas valve is failing and closing, you are loosing gas pressure or something with the control board could be bad. If it stops ignition, fan still runs a little bit and then shuts off without trying to reignite, the limit switch has been activated. Since it was already replaced there could be an issue with air flow. There could be a small blockage somewhere or maybe a fan blade is broken or the motor is weak. If the air can’t move fast enough to blow it out, the temps will rise and activate the switch. Make sure there is no blocked registers and the exhaust is clear as well. Sometimes rerouting the duct work can help as well. If there are sharp turns and twists, it will restrict the air flow. A test for this would be to remove a duct that is attached to the furnace and see how long it runs. If it runs longer, reattach the duct and see if it cuts out now. If it does, there is an air restriction.
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Owners Manuals
Blower blows cold air. Igniter clicks once but doesn’t roar like before. I need help
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RV Repair Club Video Membership
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RV Repair Club Video Membership
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Hi Maribel, what is the year/make/model of your rig?
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Hi Anthony. I don’t know of any way to get instant hot water from an electric coil on water lines. They make line heaters you can wrap water lines with but they are mainly used to prevent the lines from freezing, they don’t get “hot”. The fastest way to get hot water in a shower is to run the sink hot faucet first until it is warm. The shower will get hot within seconds after running the sink first.
Dan
RV Repair Club
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Hello,
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RV furnace won’t stay lit keeps coming on and off
Hello,
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I can’t figure out why or to clear the gas line to my stove. Hooked up the propane and not getting no gas to turn on my stove. Please help. Hope its a easy fix. I don’t have much money to invest.
Hello Kathy,
Thank you for contacting us.
What is the year, make, and model of your RV?
Sincerely,
Sarah
RV Repair Club Video Membership
Our heater was working then my husband changed both the propane tanks at the same time and now furnace does not ignite. The stove/oven and on demand water heater work. Is there
Hello Judith,
Here’s what the experts had to say about your question:
There are many things that could be causing the fan to operate and no heat. The big thing is if it tries to ignite or not. Once the fan kicks on try to listen for the igniter clicking. If you do hear it clicking and nothing ignites, there could be a blockage in the burner chamber, failed igniter, igniter not positioned properly, bad gas valve, bad regulator or the control board is not opening the valve. If there is not clicking then the issue could be with low voltage, broken or debris covered fan wheel, bad sail switch, bad igniter, bad connections or bad control board. Since other gas items are working I would assume the issue is with the furnace and not the regulator but it is a good idea to test the pressure of the system. This can easily be done but lighting the stove top burners and then turn on the furnace. If the flame drop real small or go out then the regulator isn’t putting out enough pressure for the furnace. You can sometimes disconnect the propane lines at the tank and depressurize the system by turning something on and then connecting a retrying, this sometimes helps. If the flames don’t drop then the issue is at the furnace. Some control boards flash error codes when something fails so I would look for that too. The best thing to do is inspect the fan wheel and make sure nothing is broken and it isn’t covered with dust or hair. There are no filters used in RV furnaces so it is very common for dirt and debris to cause issues like this. I would then check to make sure there isn’t a blockage near the igniter or the exhaust. Also make sure all vents are open, restricting the air flow can prevent it from lighting as well. Here are some videos that could help.
https://www.rvrepairclub.com/?s=furnace
Sincerely,
Dan
RV Repair Club Technical Expert
My propane furnace just quit working and it want do anything blower want even spin and also it want even light don’t know how to fix it please help
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I can not locate my water pump and I need to winterize. I recently purchased?
Hi Michelle. The pump is going to be fairly close to the fresh tank so check around that area. Normally it is under the kitchen sink, bathroom sink or near the front bed or storage compartments. They are placed differently in all model RV’s so if you aren’t able to locate it you might have to contact the manufacture or a dealer to look up the floor plan or plumbing diagram to find it’s location.
Dan
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my furnace starts but wont heat and short cycles
Hello. Most of the time when this happens it is because of an air restriction or the sail switch is bad. There is a switch in the furnace called a sail switch, this activates when the fan turns fast enough to push down the switch and start the ignition cycle. If the switch does not activate, the fan will run for a little bit and the furnace will shut down and go into lock out. Things that can prevent the switch from activating could be low voltage, broken fan wheel, debris on the sail switch, bad switch or a blockage in the air vents or exhaust. I would first check to make sure there is no blockage in the vents or exhaust and that you have good battery voltage. You would then have to gain access to the fan wheel and switch area to see if anything there is broken or has an issue. We do have some videos that might help as well.
https://www.rvrepairclub.com/?s=furnace
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RV Repair Club
How to remove the igniter
Hi David. You will need to gain access to the furnace components, sometime this can be done with the furnace in place if you have an outside access panel. If you only have an exhaust outside, the furnace will need to be removed. Once you gain access to the components find the control board and typically the orange wire going to the igniter. Trace it to the side of the combustion chamber. There are usually just a few screws around a plate. Remove these screws and the igniter should be able to out for inspection.
Dan
RV Repair Club
Went and filled both propane tanks. Come back furnace dont light. It clicks and fan runs and then shuts of. Wont light and heat up.thank you
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Furnace lights for 1 second then immediately goes out. Other gas appliances work fine. Has new control board and I’ve blown out the gas lines and burner tube. Plenty of propane.
I’m stumped! Please help!
Hello Dereck,
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Sarah
RV Repair Club Video Membership
I tried to turn the furnace on but the blower never kicks on. It clicks then nothing. I checked the propane and have 2 full bottles and the stove light’s right up. Not sure what to check and don’t really want to have to take it the the service center.
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Sarah
RV Repair Club Video Membership
Furnace stopped working and will not relight. Was running fine and shut off in middle of night. Tanks were full and we were running off generators at time. Have tried several times to restart as per instructions with owners manual.
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I am trying to find the hydraulic oil reservoir for the Lippert leveling system. The manual says To access the 10 by lifting up one of the entryway stairs but my unit does not do that. My question is how do I access the reservoir tank so I can check the level of hydraulic oil. Thank you
Hello Noel,
Here’s what the experts had to say about your question:
I tried looking up where the reservoir tank is located and was not able to find it listed on Winnebago’s diagram list so I can’t tell you exactly where it is or how to access it. If you don’t have a step that lifts up and the reservoir is under the step you might have to gain access from underneath. I have seen some setups with batteries like this that can only be accessed from underneath. I don’t typically see this with reservoir tanks, normally you can get access through a storage compartment or panel but again I was not able to find how this can be done. You might have to contact Winnebago to see what the best way is.
Sincerely,
Dan
RV Repair Club Technical Expert
Please let us know if you have any further questions
Sincerely,
Danesha
RV Repair Club Video Membership
blowing fuses
My furnace ran great till this year 2021 until i woke up at 5 am and no heat, yes ran on generator power true out the night and batterie charges, did a q&a with the dealer and was told to change the regulator at the propane tanks. Furnace runs ok and now my fridge shuts of when on propane and have to restart it, some time couple of tries and works then stops a couple hrs later and have to restart it make is Atwood model#HE0601 and sometimes when trying to restart igniter goes on and no propane, i have to repeat 2 time to restart the fridge. Can i clean out my propane lines or is it another problem im having. Im up in Ontario Canada and 1.5 hr away from the dealer.
Hi George. It does sound like restricted propane. There are a few things that can cause this, bad regulator, oil in the propane lines, the valves on the tanks are not opening enough or there isn’t enough propane in the tanks. Since you already replaced the regulator most likely that isn’t the issue. Propane can sometimes have oil in it from the refinery, though this is typically not common it can happen. I have had to take apart all gas plumbing lines before on a few RV’s to clear them out of oil inside. This can be done by disconnecting the line lowest in the system and angle it down, then you disconnect the one at the regulator and either let it drain or blow compressed air through to clear it out. The other issues would be with the tanks. It is possible the valves are just not opening all of the way and testing with new tanks would be the only way of knowing for sure if that is the issue. Lastly you want to make sure you have enough propane in the tanks when it is cold outside. If it is close to or below 40 degrees F (5 degrees C) you have to make sure the tanks are over half full when operating gas appliances. The tanks surface absorbs the ambient temperature to boil the liquid propane and if there isn’t enough surface area to keep up with the flow of propane needed, the pressure will drop and prevent appliances from working properly.
Dan
RV Repair Club
Does this model have a electronic igniter
My furnace won’t ignite but fan comes on. Almost brand new, have only used the furnace about two propane tanks full? Have checked fuses and battery voltage? Please help?
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When I put the super slider out, the motor will not stop, it keeps running.
Hello Charles,
Here’s what the experts had to say about your question:
If you are extending the slide out and the motor keeps running then the issue most likely is the switch. This is what allows voltage to the motor to operate. When you let go of the switch the voltage supply should stop. If it does not then the issue is most likely with the switch itself.
Sincerely,
Dan
RV Repair Club Technical Expert
I’ll check the fuse in distribution panel, electronic spark and fan are working but the pilot just goes out after it sparks with out igniting the burner !
Will not fire on gas. Gas valve not opening. No power to switch on unit. Opens with direct 12v
Hello John,
Here’s what the experts had to say about your question:
If the gas valve opens with direct 12v to it, you would have to test make sure there is 12v being sent from the control board with the ignition cycle starts. Typically after 30 seconds or so the control board sends voltage to the gas valve and igniter. If there is no voltage being sent to the gas valve but it is trying to ignite, the control board is the issue. If the ignition sequence doesn’t start at all then there could be an issue with the sail switch or fan wheel.
Sincerely,
Dan
RV Repair Club Technical Expert
I’m almost have my puma travel trailer paid off and getting ready to move in. The propane Heater was working and stopped all sudden. I got more propane but won’t fire up. The thermostat clicks but that’s it. Is it more efficient to use electric? I’ve heard it is. I think its OEM.
Hello Angie,
Here’s what the experts had to say about your question:
If the furnace won’t turn on at all it is best to start at the fuse panel and check the fuses. If the fuses are fine then testing the thermostat operation is the next best thing. You could also test the voltage at the furnace from the thermostat as well. We do have some great videos troubleshooting furnaces. Most RV’s don’t have an electric heat source. Some will have a heat pump or heat strip in the AC or maybe an electric fireplace but the furnace does not have an electric option. Gas is much more efficient at heating the RV but it does cost more since you are using propane. Electric takes much longer to heat up and is much better used warm up on a cool night rather than used as a main heat source.
https://www.rvrepairclub.com/video/hyrdoflame-furnace-troubleshooting-007920/
Sincerely,
Dan
RV Repair Club Technical Expert
Number 42 Suburban propane furnace igniter kicks in Sparks about five times no flame cycled on and off several times igniter does work but no flame could this be a spider in the line a web how do I clean the web out thanks for any information
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The furnace comes on for 20-30 seconds and shuts off. The gas stove and fridge are working fine. No shore power. I hooked up my truck to the tow plug. What should I check and how?
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Lindsay
RV Repair Club Video Membership
Got new sail swith put in and same code saying airflow problem
Hello Tammy,
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Lindsay
RV Repair Club Video Membership
Can’t get propane to the pilot light? Is the pilot office need to be replaced?
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Jean
RV Repair Club Video membership
Awning I push button to go out it moves about a inch and goes back in
Unit starts… at least fan runs… but won’t heat… slight smell of propane outside by exhaust/intake
Hi David!
We would be glad to submit this question to our experts. Can you let us know what the year, make, and model of your RV?
You can also send an email with that information to rvrepairclub@program-director.net and we would be glad to submit the expert question upon receiving that.
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Codi
RV Repair Club Video Membership
Nothing happens when turning on the thermostat.
Hi Colette,
We would be glad to submit this question to our experts. Can you let us know what the year, make, and model of your RV?
You can send an email with that information to rvrepairclub@program-director.net and we would be glad to submit the expert question upon receiving that.
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Codi
RV Repair Club Video Membership
Brand new we can’t get the heat to kick on. No clicking, nothing when we are on generator. Haven’t plugged the unit in yet but concerned about going to far with no heat. The stove works so we know propane is flowing.
Hi Lori. Great question! The ‘Ask an Expert’ section is currently for members of our online community. I would be happy to send your question off to the experts. To get started, please send the email associated with your paid membership account. Thanks!
Jean
RV Repair Club Video Membership
Ran out of propane and furnace wouldn’t restart after the tanks were refilled. Then move trailer and furnace started up once and then wouldn’t start up again. Any ideas?
Hello James,
What is the year, make, and model of your RV?
If you have any other concerns, please contact us at 1-855-706-3536, or chat with us on our site.
We greatly appreciate your business!
Sincerely,
Lindsay
RV Repair Club Video Membership
fryed converter
Steps to light my pilot light
Gas not staying on but 3 seconds …back to just blower.
Fan starts up, runs for 20 seconds and quits, no ticking sound from ignitor.
My furnace would start the fan but wouldn’t lite I had the sail switch replaced. But it still would only lite every once in a while. I rerouted the igniter wire that was touching a terminal and have not had problem since in a year.
I have just perched a 2004 Damon 4096 motorhome. It has two top air and heat unites and one Atwood furnace. The top units are remote control. there is no thermostat for the furnace. how dose it work with the top units remote control?
Hi Chuck. It depends on how the systems are setup but the furnace can sometimes run from the remotes as well. The option is usually found on the living room control. If there is no option for the furnace on the remote system then there is a singular thermostat on the wall as well. Most likely it is in the remote control system though so make sure to check all the options.
Dan
RV Repair Club
Furnace fan blows but doesn’t ignite, it’s clicking however. The stove will light 1 burner but it stays barely light on high. What’s happening?
Thanks
Hello Scott,
I’m happy to ask our experts about this issue. But we do need the make, model and year first. We look forward to hearing from you!
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Julia
RV Repair Club Video Membership
Fan starts, after a while can hear igniter clicking/buzzing, but doesn’t light, even smell a little gas from exhaust
The burner on my hot water heater will not ignite. It doesn’t have an ignitor button or an adjustment that I can see that will make it light on it’s own like it’s supposed to. What is wrong?
Hello Christopher.
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Jean-RV Repair Club Video Membership
my furnace wont ignite. It cycles on blows air then there are several clicks over the next minute or so but never heats up. I have screens over exhaust so not mud dobbers. Is this somethingI should try to repair myself?
Hello Tom! We’re more than happy to help! What is the year, make, and model of your RV? Thanks!
Hi! Heat worked fine 1 day and then stopped. Checked fuses & propane levels. Stove top lights. No heat. It clicks but nothing happens.
It will act like it’s going to light but it doesn’t. I had it working about a month ago but now that’s going to be cool I can’t get it to work. But my stove works.
Hi Rose,
Great question! I will need additional information from you to get that answered. What is the year, make and model of your RV?
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Sincerely,
Shelley
RV Repair Club Video Membership
i have no gas coming out orifice have change the little black box the tell it to work and it try to light once and then it never tryed to again fire up after
Hello Joe,
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Joan
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Air conditioner fan blows but cuts off when switched to cool thermostat clicking
Hello John!
We’d love to help!
What is the year, make, and model of your RV?
Thank you!
Jessica
RV Repair Club Video Membership
Hi. Thermostat and/ or control module (gold), have gone bonkers. Repairable but at $500. Replacement thermostat not available. What’s available for a replacement and how do you do it?
Hello Jim!
We’d love to help! What is the year, make, and model of your RV? Do you possible have the make and model of your thermostat as well?
Thank you!
Jessica
RV Repair Club Video Membership
Got a 2018 Micro Minni , furnace turns on but just blows Cold Air for 20 seconds , then shuts off ? What is wrong everything is automatic . No pilot light to reagnight ! . Any suggestions ??
Hello Russ!
That’s a great question!
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The DC wiring diagram shows a switch from 12vdc (red) to the module labeled switch. It shows a second switch labeled light (Blue lead). I am a little confused by the switch labeled light. It is not discussed in the installation instructions or the operation guide. What does that switch do and what is for. I am not sure how these two switches operate together.
Hello Jerry!
That’s a great question!
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Where is the direct spark ignition module board for the water heater located?
Hello Sean!
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Furnace blower or fan squeals when it starts, would like to wd40 it if that is the right solution.How do you access the fan, from outside or under the fridge?
Hello Adele,
Here is the experts reply:
You can just leave it empty. The chemical treatments are only needed when there are contents inside of the tank to help digest them down into liquids. After you drain the tank it can stay empty until you use it again. I know some people like to add a little water to help slosh it around during travel and clean it a little but other than that it is not necessary to add anything after dumping.
Sincerely,
Dan
RV Repair Club Technical Expert
I learned a lot on the water heater ,awesome,thanks but having trouble with the furnace,and following your directions
Just bought it and took it camping. Was told it had thorough inspection just before we bought it with clean bill of health. Took it camping and couldn’t get furnace to light (fan did come on), hot water heater to heat or stove to work. Tanks were filled just before we left, brand new battery, replaced the regulator on the tanks, still nothing. Tried to find a schematic online for my model of camper so I could find where the thermocouple is, water heater, etc….nothing online with a visual reference of where to find these things. I’m pretty handy at fixing things so I’d like to try and fix this instead of paying RV place $140 an hour.
Furnace will not work. The blower is constantly running and will not shut off with thermostat turned off. Only way to stop is to pull fuse. Propane quantity is good and stove burners work. Had been working fine but just started doing this. There is plenty of air flow coming out exhaust port. When turning thermostat up, igniter does not attempt to light. Pulled out fuse several times and let it sit overnight, but blower starts as soon as you install fuse even with thermostat off. Any suggestions? Thank you.
Hello!
We’d love to help!
What is the year, make, and model of your RV?
Thank you!
Jessica
RV Repair Club Video Membership
propane heater lights-goes out in 5 seconds
Hello Roscoe,
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Joan
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I need to get the dash air evaporator out? Its leaking freon. How in the lords name do i get access. I have the build plan for the dash and dog house but do not see a way in.
Hello Larry!
That’s a great question!
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Heater lights up, runs approximately 5 seconds, gas/flame shuts off, blower still going, approx. 5/10 seconds later heater fires up again. Does this 3 times and then stays off for a while. Please help if you can. Thanks, Jeff
Hello Jeff!
We’d love to help!
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Jessica
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Heater works then it doesn’t. Had 3 different Techs out to fix it and it works for a day or two then it doesn’t. Had both the sail switch and limit switch replaced but same old problem. I personally removed the sail switch, toggled it, tried to bend it a bit so it would push the micro-switch and it again worked for a day then quit again. How do you get this thing to work consistently?
Leroy,
Well first it should be known to never bend or manipulate the sail switch. You can’t even use switches from other furnaces, only that exact model. They are made with a certain surface area and resistance to the fan speed so altering this can affect the performance. When issues like this happen it can be multiple things. It could be a voltage drop from the converter or batteries preventing it from not working certain times, the thermostat is malfunctioning, loose wire connections or air flow issues. Most of the time when it works and then doesn’t it is an air flow issue. There needs to be a specific amount of air flow to engage the sail switch. Low air flow can be caused by blocked ducts, openings in the vent housing, debris in the exhaust, failing motor, too much dust or debris on the fan wheel, crack in the fan wheel etc. The best thing to do is check the exhaust, blow it out with compressed air, check the duct work and make sure there aren’t large kinks, and then check the furnace duct connections and the housing. You then want to check the fan wheel for damage or debris. If all of this is fine and doesn’t help, it could be a low voltage issue, thermostat or the control board is failing. The control board failing is the most common out of these scenarios.
I hope this helps!
Sincerely,
Dan
RV Repair Club Technical Expert
Our furnace works perfectly 99.9% of the time. However, twice this past week at night, at some point during the night the furnace has not come on when it should based upon the set temperature on the Dometic thermostat. We wake up to a room that’s about 55 degrees. We know the furnace came on several times during the night but for some reason it stops coming on. When we turn it off and back on, it comes on perfectly again. We have plenty of propane and again, as soon as we turn it off and then on again, it works fine again. Any ideas?
Heidi,
There are two things that can cause this. Either a faulty thermostat or faulty control board on the furnace. Usually it is the control board. The thermostat can cause this issue but since by turning it off and back on and it works fine every time then most likely it is the control board for the furnace and it will need replaced. Really the only way to know for sure is to check the wires from the thermostat to the furnace for continuity when the furnace stops working. If there is continuity through the wires, then the issue is for sure the furnace board. If there is none then the thermostat contacts are stuck and it would need replaced.
Sincerely,
Dan
RV Repair Club Technical Expert
My Suburban furnace has been acting up.
I’ve owned the RV for 5 years. During the 5 years, we traveled full-time for 3 1/2 years, but now we’re snowbirds. So I’m currently not living in the RV. It’s December here in the Northeast and we’re getting it ready to hit the road soon. So in the evenings (or when it’s below freezing) I turn the furnace on and set to around 50 degrees F. The furnace starts and runs normally, so in this instance, I leave for the night. Then in the morning, it’s cold in the RV and when I turn up the thermostat, the furnace will not run at all. I then cycle the thermostat off, wait a minute and turn it back on to heating. The furnace blower will start it’s purge cycle, then shuts down without the gas igniting. I don’t believe I hear the gas valve opening or the igniter working either. At this point the furnace won’t try to start again unless I cycle the thermostat off and on as mentioned above. I checked that there was gas by turning on a burner on the stove, also checked that both bottles had propane.
This situation has happened twice so far in the last couple weeks and when it does the only way to clear the error is to cycle the on/off switch on the furnace itself. Once I do this, the furnace starts up immediately, lights the gas and runs normally. And continues to work normally.
Because I have to cycle power on the furnace, I believe it’s going into lockout mode. Does this sound correct? If so, why is this happening?
Also, I did notice that the first time this happened that my primary propane bottle had run out during the night and was drawing off my secondary propane bottle through the propane auto changeover valve. I thought that perhaps the auto changeover valve may be bad. But the second time the lockout happened it was drawing off the same half-full propane bottle all night. And one other observation I made on the second lockout failure the evening before it happened. I just replace the empty backup propane bottle with a full one and when I opened the valve on the new full bottle, the auto changeover valve red indicator did not turn to green. But by morning, it was green. Bad valve? Low pressure?
My research thus far has pointed to a potentially bad propane auto changeover valve causing low propane pressure in the system, or at least intermittent low pressure. So I’ve purchased a new one and will install it tomorrow, Monday when it arrives. I also purchased a new circuit board as a backup. The original circuit board was replaced 5 years ago by a service technician when my furnace was not working properly. But they were different symptoms back then.
Questions:
1. What conditions will cause the furnace to go into lockout mode? And why is the only way to clear it to cycle power on the furnace itself? Is this normal?
2. What troubleshooting sequence would you recommend?
3. Should I plan on replacing or inspecting other parts?
Thank you for your feedback! Jim
Hi there Jim!
Wow! Thank you for laying your question out so beautifully! We’d definitely love to help!
We’d love to help you out!
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Jessica
RV Repair Club Video Membership
My heater will cycle 3 times and not stay lit. The outside exhaust blows hot air after I hear ignition then stops and goes through another cycle. After 3rd cycle it stops for about 30 to 45 minutes then tries to come on again. Any suggestions would be greatly appreciated. Yes I do have gas.
Season Greetings Tim!
That’s a great question!
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Jessica
RV Repair Club Video Membership
Hi my heater in the RV will come on but after it hits a certain temperature it shuts off just fine but once it goes below the temperature for it to turn back on it will not turn back on. The blower comes on but it does not lite it will continue to blow until we cut it off but no heat is created. It will click once or twice but not light and then continue to just blow air. Is there a reason or is a part broken? Any answers are very much appreciated.
Greetings Debra!
That’s a great question!
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I am not sure if my questions were submitted. So i will actually just ask my questions. I recently bought a neighbors camper with known issues. Auto ignition ducted furnace does not work, blows fuse immediately. The prev. owners wife sprayed water using a garden hose directly into the furnace vent from the outside. Is the furnace completely ruined/ needing a full replacement, or is it the circuit board? Estimate the furnace was used maybe twice. When the previous owner showed me the camper a few months ago, we realized the refrigerator was not working, and will not run on electric or gas. No lights, nothing, and the fuse is good and everything is hooked up. Is this a coincidence or related to the furnace going out. Thanks!’
Hi there Joshua!
We’d love to help out!
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Jessica
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My propane heater clicks but heat don’t turn on. My gas stove and oven work just fine.
Hello Tara!
We’d love to help!
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Jessica
RV Repair Club Video Membership
heater will turn on and then about 45 sec later kicks off
Hi there Reggie!
Let’s get that heater working again!
The ‘Ask an Expert’ section is currently for members to our online community. We do have a promotional offer if you are interested. This would include access to expert advice (like this), plus discounts, hours of Premium videos, etc. Please feel free to take a look. You can message us right back with your question if you decide to become a member and you will have a response within 1-2 business days from our experts!
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Jessica
RV Repair Club Video Membership
Have a 30ft class A Coachmna Mirada and the front thermostat does not work (no power). Replaced with new thermostat and still the same. Not sure where to check for fuse if there is one.
Hi there Andy!
We’d love to help!
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Jessica
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My furnace won’t light up i you can feel in the floor vents some air but shuts down pretty quick.
Does it need a good working battery to start?
Hello David!
That’s a great question!
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Jessica
RV Repair Club Video Membership
Hello, I have had trouble getting my piolet light lit. Ran out of propane during the night and now I can’t get it to reignite. Please help, those showers are awful cold.
Dana,
We definitely want to help!
The ‘Ask an Expert’ section is currently for members to our online community. We do have a promotional offer if you are interested. This would include access to expert advice (like this), plus discounts, hours of Premium videos, etc. Please feel free to take a look. You can message us right back with your question if you decide to become a member and you will have a response within 1-2 business days from our experts!
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Jessica
RV Repair Club Video Membership
the furnace will not fire up unless the intake tube is cover until it fires
Hey Justin!
Thank you for contacting us.
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Jessica
RV Repair Club Video Membership
Our heating system is not working, blower does not go on. We have a separate thermostat for the heat and one for the a/c. We have checked the fuse and the thermostat. The electricity is not getting to thermostat (we put the 2 wires together). The board inside heater was checked by pouring another one in which didn’t help. What else could it be?
Laura,
We’d love to assist you! Would you be able to provide the year, make, and model of your RV and I’ll forward your issue to our experts!
Sincerely,
Jessica
RV Repair Club Video Membership
Please send me the instructions for replacing the electrode part # 34570 in the furnace. Thanks. Rob
Rob,
There aren’t any step by step instructions for replacing electrodes. These will be located on the side of the combustion chamber. Sometimes there are multiple things to have to be removed first like the gas valve, fan wheel, covers or housings etc. Sometimes you have access to it directly and may need a bit extension. You will see the igniter wires going to it, disconnect the wires. There are usually just two screws holding it against the side of the chamber. Remove these screws and pull it out to replace. The best thing to do is follow the orange wire from the control board, this will lead you to the igniter and you will be able to see what needs removed before the igniter itself. I hope this helps!
Sincerely,
Dan
RV Repair Club Technical Expert
I am trying to locate the Control Module
Bodo,
We’d love to assist! Would you please provide your year, make, and model of your RV and we’ll send your issue off to our experts!
Sincerely,
Jessica
RV Repair Club Video Membership
How to light the broiler in the oven. Or will it light from the pilot light . Thank you
The broiler uses the same flame as the normal oven operation. There is a small space at the bottom of the oven to place items on to use the broiler settings. They never give much space but technically you are supposed to place the items at the very bottom when using the “broiler”. There is no separate flame or anything, you use the oven the same way you just place the items at the bottom instead of on the rack.
Sincerely,
Dan
RV Repair Club Technical Expert
I’m sure the salesman told me this but I don’t recall I know where the electrical switch is for the water heater but there is a switch on the panel inside that says water heater does this switch control the propane side of the water heater? Also when I flip the switch inside the camper for water heater it displays “fault” is this telling me to turn on the propane. We always camp in campgrounds so we use electricity.
Dear Terry,
Thank you for your patience. In response to your question-
Every manufacture has their own set up for the switches. Some have both switches, electric and gas, at the same location on the monitoring panel and others might have them separated. Suburban tanks have a switch on the outside of the tank in the lower left hand corner and some manufactures will also have a interior switch while others will only have the exterior one. It is possible that the sales person was mistaken and the model you have might be gas only too. If the switch has a fault light, this is for the gas control not electric. The fault light is there to indicate the flame is not lit. The light will go away once the ignition has started and it senses a flame. I would check the data tag on the sidewall of the water heater. This will tell you the heat sources of whether it is just gas or combination gas/electric. I hope this helps!
Sincerely,
Dan
RV Repair Club Technical Expert
Problem with my heater…..When I turn on the thermostat, I can hear the blower kick in…when the sail switch opens, I can smell propane, then the igniter lights the burner (I can hear it ignite)….heat blows out of the vents, but the problem is….It only runs for 5 to 20 seconds, then shuts off…after a few seconds, it does this all again…It won’t stay running, just keeps recycling….any idea why?
Dear Janet,
Thank you for your patience. In response to your question-
This could be caused by the limit switch being activated, gas valve closing, electrode not sending a good signal, or the control board not working properly. I would start by making sure there is no blockage in the exhaust or vents. This could cause the heat inside the burn chamber to get too hot and trip the limit switch. This can also be caused by a collapsed duct or blocked vent as well. If all of that is OK, you would then want to inspect the components on the furnace. I would check the wire connections and make sure nothing is loose. I would take out the igniter electrode and see if there is a lot of carbon build up on it and clean it off. Sometimes this is all it needs. Look for any signs of damage or cracks, if there is then it will need replaced. If that is OK, it is either the control board or the gas valve. I would look to see if there is an error code on the control board, if there is this could help you troubleshoot it as well. I hope this helps!
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Sincerely,
Dan
RV Repair Club Technical Expert
Furnace starts, runs a few minutes, burner seams to surge then furnace goes out. Unit resets then restarts and then fails in the same way except it runs a shorter period of time each restart. Any idea what is going on?
Dear Ron,
Thank you for your patience. In response to your question-
It sounds like the limit switch is activating. There is a thermal switch attached to the burner chamber and if the heat gets too high it will shut down the system. This can happen from a blockage in the exhaust or burn chamber. I would inspect the exhaust and make sure there is nothing inside of it like a critter nest or something. It is possible the switch is bad too. If you have access to the furnace control board I would take a look at that. A lot of times there is a light on it that blinks a certain error code, this could give you some idea of what is going on. I have seen failed electrodes cause this to happen as well when they are weak and shut off the gas sense when there is still a flame. You would really want to start with the exhaust and then dig into the other components after that if you can’t find any blockage.
https://www.rvrepairclub.com/?s=furnace
Sincerely,
Dan
RV Repair Club Technical Expert
got airxcel thermostat furnace will not start air conditioner will work but furnace won’t kick on
when we turn the heater on it blows the fuse, we replace the and try again it blows each one you put in do yall have any ideal what could be making that happen????
Dear Anna,
Thank you for your patience. In response to your question-
There is a short in the system somewhere, it could be in the wiring or a component using the same circuit. The best thing to do to narrow it down is to disconnect the 12v wires at the furnace. Put a new fuse in and see if it blows, if it does not then the problem is with the furnace and could be the board or wiring inside. If the fuse still blows with the furnace out of the circuit, you would want to see if there is anything else not working. Most of the time the furnace has it’s own fuse but sometimes it can share the circuit with something else and it might be a problem with that. If it is only the furnace you would have to trace the wires and see where the short is, could be stripped wiring touching each other or a piece of metal or connectors that came off. Check the wires on the back of the fuse panel and see if there is anything tied into them there. It is possible there is something wrong with the thermostat too, it shares the same voltage as the furnace. Check the wiring there and also disconnect it to see if the fuse does not blow. Some models have the 12v go to the AC and then to the furnace so there could be a problem with the wiring there as well, this is less common though. Since it is blowing the fuse right away, there is definitely a short in the system. I hope this helps!
Sincerely,
Dan
RV Repair Club Technical Expert
My furnace was working a week ago. I tried it today and the blower would cycle on then 30 seconds later would shut off, no ignition. After several attempts i decided to place my hand over the exhaust pipe and remove it rapidly several times. It immediately fired and worked. Any suggestions?
the furnce wants to run with the propane off withe switch in off
No power to furnace. Pilot light lights. Fan does not come on
The furnace will not come on unless you pull the fuse and put it back in.the thermostat comes on but will not operate the furnace. Have to pull the fuse to turn furnace off.
My propane furnace has two issues it began to constantly run but not always warm air and I live in snow country now it comes on but the ignighter dosent work it only blows cool (out side air)
We turned our furnace on last night and it worked as usual. After a bit we realised it wasnt coming on so we adjusted the thermostat. The blower came on but it never got hot and shut off after a few seconds. I turned off and back on thinkin that mite reset it but it never did. Owners manual said there was prob air int the system but my stove and waterheater worked fine. Any suggestions?
My furnace will come on the blower running but it will not light it has gas
The A/C kicked out the other day, and John went to the power inverter to check the breaker. He could not touch the breaker because it was too hot! So the breaker is Homt 30/20, with 30 being the main and 20 being the A/C.
There seems to be an empty spot at the bottom of the panel.hat he wants to do is move each breaker down the panel (if possible) and replace the tandum breaker with a 30 amp for the main and put a 20 amp in for the a/c. Sounds like too much trouble to me, or would just getting and keeping a spare tandum breaker be better? (It was a hard to get item causr no one keeps it in stock.
I’m hoping you can help me out. We live in our 5th wheel year round, this whole winter my furnace sometimes will not ignite. I’ve noticed that as soon as the 250 gallon propane tank gets around 45% the heater will sometimes not ignite. I have to turn the thermostat off and on, in some cases this will work and some times it does not. The lower the % in the propane tank the more it does not work. As long as the propane tank is above 45% there are no problems with ignition. Any suggestions you have would be greatly appreciated. It’s currently -2 outside, 250 gallon tank at 25% and I have no heat. Thank you in advance.
Appreciated your comments,low voltage I think was issue,the other thing I did was clean the panel / module board which was coated with dust of 10 years
I think the fan motor or maybe even the whole unit needs to be replaced….
Where do I find the model number?
It’s length is 25” approximately and 9”x9” approximately
Previous rig had a gravity fed valve to empty fresh water tank, Can’t find one on the Mirada. When we call Coachmen they seem to think there should be one but can’t tell us where???
The igniter will not spark. I changed the board and its getting plenty of volts to the unit. The sail switch checked out good as well. Is it possibly a ground issue? Running out of ideas.
my heater does not “re-light”
turns on no problem. heat shuts off at the set temp, but when time to start up again it does not, the fan runs. but no heat.i can turn off the heater at the wall control, wait a min, then turn back on and it fires right back up, and the cycle goes again.
the ac no problem, fan no problem. just no re-light to the heater.
Pilot light for furnace won’t light
My camper furnace won’t light. Fan runs and everything. Just wont put out heat. Everything else that’s propane works and it’s plugged into 30 amp power so I’m not sure what it could be. Maybe the igniter?
Hi Steve,
Yeah it sounds like there is a problem with gas getting to the igniter or something stopping it from not lighting. There are a few things it could be. Do you hear a clicking noise? This would indicate it is trying to ignite. If there is no clicking, the igniter electrode could be bad or the board is not sending the voltage to ignite. It could be a loose connection on the board or faulty board. If it does click, the board it sending voltage to the igniter but the igniter could be damaged or have carbon build up on it and needs cleaned off. Also when clicking but not lighting, the gas valve may not be opening allowing gas to the burn chamber. Normally if you smell gas at the exhaust when the furnace kicks on it is a sign the gas valve is fine. If you can’t smell the gas, you may want to have the gas valve tested. The orifice on the gas valve could be dirty or clogged as well. Again, the control board might not be sending voltage to the gas valve either. You would have to check the voltage going to it when the furnace turns on and make sure that is good. Checking and testing all of the components is really the only way to find the problem.
I hope this was useful!
Dan
RV Repair Club Video Membership
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Blower comes on for just a few seconds, but the furnace will not ignite. Checked fuel supply, fuses, all good.
Can’t get the furnace to work
The furnace wont ignite the stove ignites what should I check
Hello, our furnace has stopped this morning. We can hear the thermostat clicking but no hot air. No fuses are blown but with our make there is a light to each fuse that turns on when the fuse is blown and those are not turning on even when I unplug the fuse. All other LP appliances are working. Any ideas?
Can you hook up the two wires on the outside of water heater wrong when changing switch?
Can you hook the wires wrong when putting a new electric switch on the outside of a hot water tank?
Hello,
Nope, they can go on either post. A switch just disengages the circuit when power is off and completes the circuit when the switch is on. It essentially just connects the wires when on and disconnects them when off. This is how simple switches work, putting them on either post does not matter.
I hope this helps!
Dan
RV Repair Club Video Membership
Gas heater tries to come on when thermostat is turned up but goes right off after a few second. After about 4 cycles it shuts off. Worked the night before.
Hello,
When the furnace does not light after a few cycles, it shuts off into lock out mode as a safety feature. This can happen from low gas pressure, running out of LP, failing gas valve or problem with the igniter. Most likely it is a propane issue if it worked the night before. If it is really cold outside, the propane tanks have to be at least half full to function properly. When the weather is really cold outside, the liquid propane has a hard time turning into gas especially when below half full. This is called exceeding the rate of vaporization. If you have a regulator that has a pressure indicator, usually green or clear when has pressure and turns red when low, check this when running the furnace. If it turns red when the furnace kicks on, you may need to fill the propane. Your regulator could be sending too low of a pressure too. You could do a simple pressure check by lighting all of your stove top burners, turn on the furnace and check the flames. If they get low, there is a low gas pressure problem. The regulator is set up to handle all appliances running at the same time. If the gas pressure is fine, there could be something wrong with the furnace itself. You would have to gain access to the furnace and check the components. Some control boards give an error code with a flashing light, if it doesn’t have this feature you would have to inspect the gas valve, orifice, igniter, fan wheel and exhaust for blockages.
I hope this was helpful!
Dan
RV Repair Club Video Membership
All gas appliances work including the water heater but the furnace just kicks on for 20secs and blows cold air then shuts off. Tried fuse, waiting and turning back on. Nothing. 20* outside and freezing. Any suggestions? Thanks!
I need to know how to light the furnace on this camper. I believe I has been seating up for a while but I need to know as soon as possible
Cant find where or what to do to light the furnace. Do not see a switch to turn on other than the thermostat. Can you help?
My fan is blowing cold air furnace wont ignite. There is a white wire like hanging down from the top but I don’t see any place for it to go. Freezing please help.
When I turn my furnace on it only wants to blow cold air. I’m a first time rv owner and I’m kinda lost on what to do. Is there someway I can trouble shoot the problem. If there is, please help me.
Under floor heating not working
When I first turn on my furnace everything works fine. I toggle my dometic digital thermostat to furnace, I hear the relay in the overhead fan click, the blower start, and within 5-10 seconds the igniters ignite and hot air is blowing out of the ducts. My issue is that when the temperature inside the coach has reached the desired temperature the furnace and fan shut off but will not restart after the 2 degree drop in temperature. The only way I can get the furnace to come back on is to turn the furnace off and wait several seconds then turn it back on. Is this a thermostat issue or another issue?
I have a gas propane fifth wheel when I turn it on the fan comes on for a few minutes and then it shuts off I have replace both thermostats in the house my trailers is new help
when you try to turn it on it blows a fuse, we had it worked on and put it back in and it worked for about 2 weeks and now it blows the fuse if you try to turn on, dont know whats wrong with it do you have a ideal of what it might be? thank u
have gas no pilot
My front furnace (kitchen slide out, passenger side) quit working at a stopover coming back from MI. blower would cycle for a few seconds (cold air) and then turn itself off (interdependent shut-off since burner not lit). None of the probable faults in the article above seems to apply. I had high 12’s house VDC, plenty of LP, and the DC fuse in the DC panel was not tripped. AND, the rear furnace was working to heat the bedroom area. So, the front furnace outage seems something more difficult and requiring factory service? It’s now November and I’m not that happy with a brand new RV furnace quitting on me. Factory trip? or something I can check behind the panel near the furnace exhaust?
Our furnace will lite but does not stay lit. Could you please tell me what i need to do to fix it
I can light the pilot on my hot water tank and it stays lit but it goes out when I try to turn the dial to run… it won’t jump over to the main burner
I turn it on it comes on does not light just blows cold air. U can here blower but can’t here it tryen to light
Brand new to. Furnace was working wonderful. Temperature outside dipped to 50 degrees. We have been using the furnace during the day and night to load RT. Replaced lip tanks even though 1 still had a half tank. Turn on furnace. Runs for 30 seconds or less then shuts off.
the thermostat in my motor home goes blank I have checked all the fuses it came in this morning and ran for a while but now has gone blank again – when the thermostat come on it works fine
Furnace doesn’t ignite unless I hit the reset multiple times. Sometimes you can hear it clicking and sometimes you can’t
Why does the fan kick on and the igniter fires, and then comes the flames.
Runs great for ten minutes the it cuts out and kills the power with it. before the fan kicks on the lights have to flicker and the come back on, then the fan kicks in and the whole process go on every 3 minute. What is wrong?
My self lighting furnace will not light. Before I had my tank filled it was lighting and working. Now only the blower kicks on. What could be the problem
Can you help
HOW TO TAKE OUT FURNANC
I specifically don’t know what to do about my floor furnace and the voltage works but it will not ignite Flame
Furnace not working !! I turn the thermostat up and I can hear it click at the furnace but that is all it will do . The blower won’t come on or nothing
Can hear fan motor come on then gas valve. Can hear it trying to light but after third try it shuts down
Pilot won’t light in my gas furnace, I’ve replaced the thermocouple the fan works great, I just had it running 5 days ago and now nothing,
Qe are contemplatind adding a tow device tp pull a small non=AWD vehicle
Hello, my roof top A/C unit was working well, then I had shut it off because we were going to be gone for a few hours. Came back went to turn it back on and all I got was a humming sound. Left it off until getting home and I went up top to remove A/C cover. Checked freedom of fan motor. It spins very easy. I need to mention that while at the camp site the RV was plugged into a 30amp receptacle. Also the filter in the RV is clean. Because I am not skilled in RV A/C units, I need to know where to go from here. Thanks for the assistance.
Kelly
Hello,
The first thing you need to check is 120-volt power and amps going to the compressor motor. If you have low voltage from the campground, or have to much drawing power from your rig, the compressor motor does not have enough amperage for start up and will hum. This can also be a plugged filter which you state you checked, but also a plugged evaporator coil which you would need to take off the plastic shroud and remove the metal evaporator shield.
Hope this helps,
David
RV Repair Club Video Membership
How do we find where to check the transmission fluid and where to add transmission fluic
the pilot lite in the oven won’t stay lite. When I release the knob it goes out,as long as I am holding the oven knob in it is on
Fixing furnance
My furnace is not igniting. Getting propane, blower fan working and igniter clicking but won’t light. Help!!!
I have a suburban furnace that won’t light. Can hear the sparker and fan going but will not light. If I go out site and put my hand over the exhaust the furnace will light and run. Took it to the dealer who hooked it up to a bottle on the bench and it worked fine but back installed the same issue. Is it a pressure issue?
I have a 2005 Jayco Greyhawk and had an unfortunate tire blowout this weekend. When the tire blew, it destroyed the storage compartment and ripped off the “ quick coupler” for the BBQ grill (which I have never used). Is there a shutoff for that LP line other than the main LP tank?
Took dometic refrigerator out to replace with a electric refrigerator only, now the furnace will not work. The blower works, but will not start. What could the problem be? Thank you
have troubleshooted furnace to either sail switch or motor, can’t find info on motor speed. also haven’t been able to find parts supply. any help would be apprectated. thanks
Furnace blower comes on tried to ignite three times but won’t stay then just blows cold air.
Help, it blows but won’t heat. Changed the thermostat and fuse is good . did other things too but nothing is working and its very cold.. Help me
Furance won’t lite it clicks was working fine went and filled propane tanks then came back and and hooked them up then the furance wouldn’t lite
Our propane furnace will not ignite, fan runs but no click for flame. Propane tank full, hot water and stove work. Checked out flow and fuses, all ok!
Fan comes on-will not ignite, fan stops after about 20 sec. propane tanks are full. Worked all nite then would not turn on in the a.m. Batteries are ok
How do you get in when door won’t open?
How do get the door open when it’s stuck
My coach has 2 furnaces and the rear one works just fine but the front one refuses to light but the blower runs..I have over 12 VDC,,I can not hear the striker trying to light the gas but it could be,,I am waiting for the weather to break a little here to get a better look,,any suggestions??
Hello Teddy,
To troubleshoot the furnace you need to understand the sequence of operation and determine which action is not happening. The thermostat calls for heat when the temperature drops below the setting and a circuit is closed sending the request to the module board. The module board then starts the blower motor which pushes air into the burner chamber. This lifts a sail switch at the front of the chamber, once this sail switch gets to a certain height, it also creates a closed circuit which tells the module board there is sufficient air flow to light and the gas valve is opened and the spark ignitor lights the burner assembly. Hot air is then blown through the burner chamber to the vents inside passing over a high limit switch at the end of the burner chamber. If a vent inside the rig is closed or blocked with a rug and the air is restricted, the burner chamber gets to hot and the limit switch shuts the unit down.
So if the blower fan does start, but the unit does not light, then you either have low voltage to the fan which will make it run, but not fast enough to raise the sail switch or you have a bad sail switch. You can pull the outside furnace cover off and try the sequence again to actually verify if you hear a click and an attempt to light? From the inside you probably would not hear any spark or attempt to light or even if it did ignite? Verify the actual sequence and what is happening and what is not happening.
Thanks,
David RVRC Video Membership
Furnace won’t light an don’t hear ignition
SHOULD THE BLOWER MOTOR FOR THE FURNACE TURN FREELY WHEN NOT ON? MY HEATER WILL NOT COME ON AND THE BLOWER MOTOR WILL NOT TURN. HAD DIRT DOBBERS THAT MADE A NEST IN THERE
Hello Mike,
The blower fan and shaft to the motor should turn freely when not in use. If it does not turn or grinds heavily, something has gotten inside and jammed it.
Thanks,
David RVRC Video Membership
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Rv blower kicks on, furnace lights, but turns off after 5-10 seconds. It does this three times then turns off. Help!
To troubleshoot the furnace you need to understand the sequence of operation and determine which action is not happening. The thermostat calls for heat when the temperature drops below the setting and a circuit is closed sending the request to the module board. The module board then starts the blower motor which pushes air into the burner chamber. This lifts a sail switch at the front of the chamber, once this sail switch gets to a certain height, it also creates a closed circuit which tells the module board there is sufficient air flow to light and the gas valve is opened and the spark ignitor lights the burner assembly. Hot air is then blown through the burner chamber to the vents inside passing over a high limit switch at the end of the burner chamber. If a vent inside the rig is closed or blocked with a rug and the air is restricted, the burner chamber gets to hot and the limit switch shuts the unit down.
So it it lights for a few seconds and turns off, the high limit switch in the back of the burner chamber is getting hot due to a plugged or covered vent inside the rig, or a bad switch.
Thanks,
David RVRC Video Membership
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I had the same problem that drove me nuts. The LP pressure regulator was the problem. Everything may look like it’s working fine. However, if you don’t have the minimum pressure required for the furnace, it will not work. My stove etc. worked fine which made me think the regulator wasn’t the issue but it was. Try replacing the regulator. It’s easy and I’ll bet it will fix your problem.
I’m confirming that Richard is CORRECT. I had the same problem and after spending over $600 on three different Techs, the last one ordered a newly designed sail switch but when he came to do something else, decided to test the propane flow. It indicated below 10 inches and he said it had to be at least 11 inches. He adjust the regulator to 11 inches and the heater has been working just fine ever since even without the new sail switch.
My Sprinter has been stored outside without cover since new. I believe the seals/gaskets on the two slide outs are deteriorated and in need of replacement. Can you tell me if the replacement seals are glue in type or are they held in place in some other method. Also if my assumption is correct should I replace the inner gasket at the same time as the outer set. Thanks for your help.
Hello Tim,
To provide more specific information on the slide room seals of your RV we need the make, model, and year. Some manufacturers such as Winnebago have a double sided bulb seal around the perimeter that slides on to the metal flange of the sidewall similar to the seals used for the compartments. Others are applied with a sticky tape already applied to the seal.
Thanks,
David RVRC Video Membership
I ran out of propane. After filling up, the furnace is making a spitting noise and want ignite. The stovetop repute and working. The fuses are good. I don’t know what else to do. Thanks
Hello John,
To provide more specific troubleshooting information we need the make, model, and year of your rig as well as the type of furnace. Depending on the year it could be a Suburban, Atwood/Dometic, or HydroFlame which all have a similar sequence for starting. When you run out of propane, all the lines get filled with air and it takes longer for some appliances to purge that air than others. Typically the stove top will purge faster as it’s a simple on and light sequence where the furnace and the refrigerator have a few precautionary steps in the sequence before it attempts to light. Here is how the sequence goes for lighting:
The thermostat calls for heat when the temperature drops below the setting and a circuit is closed sending the request to the module board. The module board then starts the blower motor which pushes air into the burner chamber. This lifts a sail switch at the front of the chamber, once this sail switch gets to a certain height, it also creates a closed circuit which tells the module board there is sufficient air flow to light and the gas valve is opened and the spark ignitor lights the burner assembly. Hot air is then blown through the burner chamber to the vents inside passing over a high limit switch at the end of the burner chamber. If a vent inside the rig is closed or blocked with a rug and the air is restricted, the burner chamber gets to hot and the limit switch shuts the unit down.
So, when you run out of propane, the furnace has to go through all these stages before attempting to light. Not sure what the “spitting” sound is, could it actually be the spark ignitor trying to light? Unlike the stove top, the gas valve does not just open and allow LP to flow, so the fan could start and tell the module to open the gas valve and try to light, but if it’s purging air, it will only attempt this a few times before shutting down? I would suggest trying the procedure several times without any other LP appliance running to see if it will eventually light. If not, try to identify where the “spitting” sound is coming from and we can dig into it further.
Thanks,
David RVRC Video Membership
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Furnace won’t light blower runs need help
Hi James, please provide the make, model and year of your RV so we can assist you. Thank you, Hallie RVRC Video Membership
Heater doesn’t heat when below 32 degrees
My heater will turn on fan runs the unit will blows hot air for a couple of minutes the it starts to make a good poof sound and then the air will start to cool off could this be the ignitor going bad
Hello Michael,
To provide more specific troubleshooting information we need the make, model, and year of your RV and the furnace make and model. It’s probably either a Dometic/Atwood or Suburban and if the unit starts the blower fan and ignites for a short time, it would not be the ignitor? More likely it would be a thermocoupler which is the probe or sensor directly above the igintor and flame which senses there is actually a flame that started and is burning. Typically there is a current running through the ignitor, through the flame, and then to the thermocoupler. If the flame is not touching the thermocoupler, it creates an open circuit which tells the module board that there is no flame and to shut down. This could be caused be a flame that is to low or to high which could be adjusted by closing the flow tube slightly which is the tube going to the burner assembly with a hole that allows air to mix with the gas. This tube slides back and forth to make the opening larger or smaller which allows more or less air into the mix. Try loosening the set screw and sliding the tube closed a little to see if that helps? You want to see a nice blue flame that does not dance around and goes up to the thermocoupler.
Thanks,
David RVRC Video Membership
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Propane is on – the blowers inside the motor home blow but there is no heat and you cannot hear the ignitor sparking or clicking.
Went camping in our 5th wheel and heater worked that night. When we woke up next morning the heater wouldn’t turn on. I could hear it trying to ignite but no heat
Hello Mason,
First, check the voltage of the house battery. It needs to have at least 10.5-volts and some models need 11-volts. If it is trying to start by clicking, clean out the burner assembly as you might have soot or other object blocking the flow of LP. Next, check your stove top to make sure your LP system is working and the flame is a steady light blue and not jumping around. If you can take a look at the spark assembly, see where the spark is going. If the ceramic insulator is cracked, the spark will travel down the crack and not get to the flow of LP.
Thanks,
David RVRC Video Membership
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Our furnace will try to kick on. I hear it try to light. The blower will go for a min or so then shut off. This happens in the colder mornings but works fine latwr in the day when jt is warmer
Hello Becky,
To provide more specific troubleshooting information we need the make, model, and year of your furnace. Typically the furnaces (Suburban and Atwood) work like this:
Thermostat calls for heat and creates a closed circuit which provides low voltage to the module board. Module board starts the fan up and runs for a few seconds which pushes the sail switch up at the end of the heat chamber telling the module board there is sufficient airflow. The module board opens the gas valve and sends power to the spark ignitor. The clicking sound you hear is the spark trying to light the gas/air mixture in the burner tube. Once the flame is started, the flame sensor above the spark ignitor needs to be touching the flame for the continuity to pass and tell the module board there is a flame. Otherwise it stays open for only a short time and shuts down thinking there is no flame so it should shut off the gas valve. It could be the flame sensor is not aligned with the flame above the spark assembly, or the burner tube is dirty and not allowing enough LP through which would create a smaller flame. Typically this would not just happen in cold temperatures though? I would say you have a weak flame sensor or bad wire that “shrinks” when the temperature is cold which could be a connection or the sensor itself. It could also be a solder joint in the module board in a circuit controlling the flame sensor? These shrink in cold temps and the crack creates an open circuit not allowing power through. When the temps warm up, the solder expands and makes the connection?
Thanks,
David RVRC Video Membership
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Furnace stopped working in night. Appears one LP tank is empty but the other has gas in it. Stove still lights. Help! We are presently on a camp site!
Hello Saralyn,
Sorry for the delay in the response, hope you got through the night and found an alternative. If your furnace is still not working, check these items:
House batteries must be at 10.5 volts or higher. If not, the gas valve and spark ignitor will not work but the blower will.
Do you hear the furnace trying to light? If yes, you could have a bad module board that is not opening the gas valve, or cracked spark ignitor which keeps the spark from getting to the burner
Try a new thermostat.
Thanks,
David RVRC Video Membership
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Heater ignites but is intermittent/ popping, however continues to burn.
My furnace is set at 60 the ambient (outside) is about 35. The blower comes on as usual and a few seconds later the flame ignites. After it has run a bit it starts a cycle. Blower stays on, flame ignites for about five seconds, then goes off. Blower continues. Flame reignites and goes off after about five seconds. Flame is off for about 8 seconds between ignitions.
the fan will not run unless I shack the whole unit. I do not think it is the heater that came in it. it ran good until on day it just stop, I shuck the heater and the fan would start but would quit as soon as I quit shaking it. I am thinking it is a ground problem.
The furnace won’t turn on. Where do I find the 12 volt fuses? I’ve checked the thermostat and if I attach the red and white wires it doesn’t turn on.
Hello Peggy,
The fuse for the furnace is in the distribution center with the other 12-volt DC fuses. Most furnaces do not have an onboard fuse in the module board. Check the fuse at the distribution center and if you have 12-volt power coming out, check the plug at the furnace itself. You should have 12-volt power at the red wire and also the blue wire which typically goes to the thermostat. If you have power there, then it’s a matter of pulling the unit out and checking the sail switch or the limit switch.
Thanks,
David RVRC Video Membership
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I recently had my 80 amp converter die while traveling to AK. The RV repair shop only had a 65 amp converter & it would’ve taken 2 days to receive a 80 amp. I opted for the 65 amp. So far (3mos) I’ve had no electrical issues. Is this ok?? My wife & I do not dry camp, where upon we would be using battery power..
Hello John,
You should be OK, the 80 amp converter just has more charging power for larger battery banks and will charge faster.
Thanks,
David RVRC Video Membership
We’d love to have you be a part of our community. We are convinced you will enjoy the benefits of becoming a member and having access to the best instructional how to videos and professional tips. We would like to offer you a special promotion for your first year membership.
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I can’t get my hot water heater to light the model number and brand is faded I can’t see it. It lit for like a min when I first bought it hi now it won’t light help please
Hello Rae and Mandy,
First you need t verify that you have 12-volt power to the unit. Use a multimeter and check the incoming voltage. If it is less than 11 volts it will not light. While you are there, check the fuse on the module board as well. Does the unit try to light, meaning you hear a clicking or spark? If it does, then you may have a dirty spark ignitor not allowing the spark to get to the burner assembly and fuel/air mixture, or a cracked spark ignitor that has the spark traveling down the crack not to the burner assembly, which is called carbon tracking. Also verify you have proper LP pressure by testing the stove top or other LP appliance. Otherwise it’s probably a bad module board.
We’d love to have you be a part of our community. We are convinced you will enjoy the benefits of becoming a member and having access to the best instructional how to videos and professional tips. We would like to offer you a special promotion for your first year membership.
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Thanks,
David
RVRC Video Membership
What is the amperage draw for the hydraulic pump for the slide outs?
Hello Joseph,
To provide more specific information on the amp draw of your hydraulic pump we need the make, model, and year of your RV as well as the slide mechanism manufacturer and what slide.
Thanks,
David RVRC Video Membership
The atwood hot water heater burner will ignite when you flip the switch to on position and water gets hot. After that the burner will not ignite any more on its own until you flip the switch again.
can I replace the hard wired CO2 detector with a battery operated unit? the hard wired unit is on the wall in the bedroom and in the way. I would like to move it about 12 inches higher and 24 inches to the left
Hello William,
Yes, I would recommend the brand Safe T Alert as they make one specifically for the RV industry and has all the correct approvals for UL, NEMA, and other listing as well as temperature range. Make sure you change the battery each year!
David
CCRC Video Membership
do you have a video or class for furnace repair
Hi, Gary. Here is the content we have available on furnace repair: https://www.rvrepairclub.com/?s=furnace%20repair
Watched video on fuses and I guess something blew up, because it turned black. Like what I saw it was too bad something went wrong.
Ck my sent emai
How can you tell your generator runs on gas or propane?
Hi, Doug. Typically the generator model number will have an LP designation in it, or the data plate will list a fuel source. The owner’s manual should also state the fuel source. Otherwise it’s a matter of tracing the fuel line coming into the carburetor back to the source. Since you did not provide a make or model of the RV or generator I assume it’s a motorhome as a trailer would not have a gasoline tank and therefore no means to provide gasoline? Most gasoline motorhomes have a gasoline powered generator as LP is precious and runs out fast. Some diesel powered RVs use propane as they do not like noise and smell. An easy way you can tell is turn off the LP at the tank and see if the generator will start and run for a few minutes.
The Leprechaun 260 has a 4000 kw gas Onan generator.
Faucets don’t have hot water. Where is flame located In to light it
Hello. It depends on what type of water heater you have. Most water heaters these days have a direct spark ignition and should light on their own when the switch is pressed for the gas operation. On pilot models it is all done on the outside. There is a button that needs to be pushed in and held while a flame is at the end of the burner until it lights. If the direct spark is not working you want to check the burner for a blockage and make sure you are hearing a clicking noise and seeing a spark from the igniter. Usually the issue comes down to a blockage or issue with the igniter itself. I will share a link to some water heater troubleshooting videos. There are multiple issues that could cause this depending on what water heater you have. These videos should help give you a better idea on what you have and what to look for.
https://www.rvrepairclub.com/?s=water+heater
Dan
RV Repair Club
Furnace fan runs. 12 volts No spark or power to valve
Hello Paul,
Thank you for contacting us.
What is the year, make, and model of your RV?
Sincerely,
Lindsay
RV Repair Club Video Membership
This morning my heater worked switched tanks and now the heater wouldn’t get hot you can hear it tryin to light. I don’t know what to do.
In South Carolina he will also need to look for mud dauber nest on igniter!
the problem is when the blower works and the heater doesn’t ignite it is the board inside heater it will have to be pulled out and replaced it is inside your heater unit chances are if you were at a camp site and you didn’t have a device to control spikes it zapped your igniter board
How to repair puncture in bottom of gray water tank
Let N.Carolina know, if the fan motor is not turning fast enough, it won’t create enough “DRAW” to pull the “SAIL SWITCH” therefore, not telling the gas valve to open and the igniter time spark!
Thanks, Charlie
Good luck,& keep
At it, you’ll get it
Heater only comes on when during the click I hold my hand to the exhaust. Usually after the %2nd or 3rd click. Then after furnace starts and shuts off after desired thermostat setting it will not will ignite but blower will run.
Heater will not ignite(blower running) until I hold my hand over exhaust usually after 2nd or 3rd click. Will heat until thermostat shuts off then will not reignite but blower will turn on. Blows only cold air. Thks
Hello Dick,
Thank you for contacting us. Great question! The ‘Ask an Expert’ section is currently for members of our online community. By becoming a member, you will have access to our expert’s knowledge in heater repair. With your membership you will also receive discounts on products and hours of Premium video content.
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Madeline
RV Repair Club Video Membership
I had the same issue when camping with my Stealth after it was working. I pulled the panel to access the heater box where the hose attaches an noticed a return hose was not hooked up came lose so it was a safety feature check the duct hoses may solve your issue it did for me
I have a Suburban Propane Furnace. It went out and had it repaired the guy who repaired it would not install it back in my 5th wheel. He diagrams how to install it back but don’t know if my husband did it right. It wouldn’t run. It was working when the repairman ran it on a battery. Diagram got lost. Do I just say forget it and buy a new smaller unit??? And I would rather have a wall unit, would a wall unit be safe???
Steps to light my pilot light
Propane tank full of gas turn valve on wide-open gas will not come into RV to stove furnace fridge raider or the hot water heater why
Great question! The ‘Ask an Expert’ section is currently for members of our online community. I would be happy to send your question off to the experts. To get started, please send the email associated with your paid membership account. Thanks!
Jean
RV Repair Club Video Membership
I had that problem and replaced the ‘pig tail’ propane line from the selector switch to the propane bottle. About $30. Worked great. Pig tail has self contained valves which stay open if the pressure is correct (about 11 in. water column). It appears the faulty pig tail hose contained valve springs? were worn out.
Will not lite fan runs
Hey William,
We would love to answer this expert question for you but I would need the year, make, and model of your RV. Once we receive the information, we can pass it along to the experts.
Sincerely,
Danesha
RV Repair Club Video Membership
Heater does not light
Help
Furnace won’t ignite , power to new valve has gas . If the gas valve has power to it when igniter starts clicking and has gas to the valve why doesn’t it light?
Hello Doug,
Great question! The ‘Ask an Expert’ section is currently for members of our online community. By becoming a member, you will have access to our expert’s knowledge. With your membership you will also receive discounts on products and hours of Premium video content.
If you are interested in becoming a member, please click on the special offer below:
https://go.rvrepairclub.com/a19774/
Thanks!
2016 Forest River with Suburban Heater: I had this
problem often for a couple of years & finally decided
to get to the bottom of the problem. I had tried
everything in the book to do with the electronics &
fuel. Nothing worked. This time I removed the igniter,
blew out the fire chamber with an air hose. Then I
took a look at the burner which comes out with the
igniter. Half of it needed a good cleaning with a wire
brush. When I re-installed the igniter to the burner, I
noticed the igniter gap was too wide so I adjusted
it by bending the ground probe to a 3/16” gap. When
I finished the complete re-assembly & tried it, it
worked beautifully. We have since went through
several low 40 degree nights & it hasn’t’ failed
one time. Sometimes the simple things you hear or
read about are the best things to do. Bye the way,
some will say you’ll need to replace the PC Board.
Maybe under some circumstances but remember this is a 12 volt furnace, therefore the probability of an electrical spike through the 120 volt is very unlikely since would have to go through your batteries. Very little chance of that happening. Good Luck.
We came to the camper and smell a strong rotten egg smell, I have a gas detector which said we had gas inside the camper. We opened windows and turn fans on aired it out shut the gas off. But before I turn the gas off we couldn’t get the furnace to come on, it would start and run for about a minute and then shut off with no heat. Plus my gas detector showed gas was leaking somewhere in the oven, or Possibly the burners, anybody have any answers?