Heating System Session 1: Overview of the Heating System

Whether your rig has a Dometic or Suburban brand furnace, both operate on LP gas provided by the DOT Cylinder on a trailer, or ASME tank in a motorhome. When the thermostat calls for heat, the motor starts blowing, lifting a sail switch that tells the module board there is proper air flow and to light the vapor. An exterior vent provides fresh intake air and exhausts the heated air to the outside.