Dometic Heater Sail Switch Wiring and Ignition Troubleshooting

[MSTOCKBRIDGE]

Early last year a mobile RV tech replaced the sail switch on our 2016 Montana. I continue to have issues with the heater. Heater cycles on and off 3-4 times then will not ignite. I am replacing the sail switch again, but I did not pay attention when I took the old one out. I have a spade with 1 wire, and the other one has 2 wires. Can someone please tell me where the single wire connects, is it the one on the left?

 

[Daryles]

Hope this helps

 

[ChuckS]

wiring diagram

 

[MSTOCKBRIDGE]

Hope this helps

Thank you so much.

 

[MSTOCKBRIDGE]

wiring diagram

Thank you so much

Hope this helps

Hope this helps

Thank you

 

[Powerbehaved]

Early last year a mobile RV tech replaced the sail switch on our 2016 Montana. I continue to have issues with the heater. Heater cycles on and off 3-4 times then will not ignite. I am replacing the sail switch again, but I did not pay attention when I took the old one out. I have a spade with 1 wire, and the other one has 2 wires. Can someone please tell me where the single wire connects, is it the one on the left?

Had lots of issues with mine. Wiggled lots of wires coming off the board. The furnace will try to ignite 3 times before you get locked out. The switch is there to reset. When you reset and blower comes on you will here it clicking to try and ignite and smell propane. I wiggled the wires and one was loose. Started working and hasn't failed again. That year of sail switch was better than today's according to my RV mechanic

Thank you so much



Thank you

 

[rickybobby]

I had issues with my furnace last year, had it cleaned and still failed. I did notice my stove was burning more orange. Took it back to repair, they replaced the main regulator and the low pressure one on driver's side. All work great now, including stove.

 

[GreG L.]

Had a very similar issue, it turned out to be a thermal fuse (black one if I remember right) in the fuse box, it would heat up and trip when the heater was turned on and the fan started, once it cooled down (less than a minute) it would try again, the more it tried the longer the dead time. Replaced it with a regular fuse and all was fine.