An RV Furnace Won't Light

Propane Flow Problems

• The flow of propane may be stopped. The regulator on the propane tank may not be working and, if so, propane will not flow. The propane valve in the furnace may be broken or clogged. The flow of propane may also be halted if exhaust vents become blocked or clogged. The electronic control board for the furnace can, if it ceases to function, cause the flow of propane to cease.

Propane Ignition Problems

• A faulty or dirty igniter can cause the propane to not ignite. If the wiring between the furnace and its electronic control board is broken or corroded, this can also create an ignition problem.

Electrical Considerations

• An RV furnace operates on the 12-volt direct current (DC) system. It does not need to be plugged into 120-volt power to operate. Most contemporary RV furnaces include a direct spark ignition system, so there is no manually lit pilot light. The thermocouple, an electronic sensing device, could be positioned improperly in the pilot flame and it could need to be adjusted.