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My RV Furnace won’t work

I was chatting with our neighbor in an RV park when he mentioned that their RV Furnace wasn’t working. I mentioned that I was an RV inspector and if he didn’t mind, I could look at it, maybe I could help.

I asked if they had Propane and he indicated they had breakfast earlier and the burners on the stove worked fine. That told me he had propane. Next step was to check if power was going to the circuit board of the furnace. It appeared no power was getting to the furnace. We pulled the circuit board out, checked all connections and they appeared secure and we didn’t find any lose wires. Next to the thermostat.

We operated the thermostat and every time he selected the “heat” option, the AC unit came on. We adjusted the fan motor option from low to auto. We then turned the thermostat to an off position and went back to the circuit board, selected the reset button, turned it off, waited a few seconds, then turned it back to the on position.

I asked him to operate the thermostat, selecting the heat option as I waited outside listening for the furnace fan motor, a few seconds passed and bingo, we had ignition of the fan motor, a few seconds, later the propane ignited and we had heat.

Sometimes repairs are simply as resetting everything and starting over.