Furnace stopped working

[hilfikerkg]

Problems with the furnace hoping someone knows the answer. Was working previous trip and this trip it stopped working. Turn on the furnace, set temp, hear a click in the AC unit, no ignitor clicks in the furnace.

Picture of thermostat included. Furnace is Attwood Model AFSD20121. AC is Dometic MFG # B57915.711CO SKU # 9105304463 Product # 936000-107

[phipps33]

First thing, check propane tanks. If my tanks have been turned off I always light the stove to purge most of the air from the LP lines. If on battery, make sure you have enough charge in the battery.

[hilfikerkg]

Tanks full, battery charged to 13.4, worked one day, stopped the next.

[NJKris]

Friend of mine just had similar issue, turns out there was a low battery in T-stat. Another frequent issue is a dirty sail switch, especially if you have pets shedding hair.

[hilfikerkg]

Hmm. Thermostat is on house battery. I think the fan should run if the problem is the sail switch. Issue with the sail switch would cause the rest of the furnace to not work.

[NJKris]

I think you are right about sail switch. Here's some troubleshooting steps that seem reasonable: https://www.rvingknowhow.com/rv-furnace-wont-ignite/