Furnace heater not igniting

[dagst1]

Just seen your last post. No problem just need to ask questions to be able to help. As I said we have all been there. And I still learn something everyday ---- well at least I try to.

[Red7414]

I did exactly that but had thermostat set on the highest setting before I even turned everything back on. Microwave, refrigerator, and all outlets work. Campsite I'm at has a 30 amp hookup. That shouldn't be the problem though. On another note, now my water heater isn't working. I also checked outside on propane tank and it looks frozen on the bottom?? Is this where my problem is, havent googled it yet but am about to next. Weird thing is the stove top is still pulling gas...

[Jeffur]

The flame sensor is not sensing a flame or stable flame. Make sure you have gas to the furnace gas valve ( back off the line nut and smell for gas). If gas smell is noted it is then a gas valve circuit issue. Best to have a licensed gas technician fix it.
There is more I can suggest but you should have a tech look at it. If you chose to proceed without a tech I suggest you post a picture of the gas valve and combustion chamber.
Spiders love to nest in these crevices and venturies

[blkdth1313]

Had this same issue once in very cold weather - first thing we did was run to Walmart and get a few ceramic space heaters. It was New Year's Day! Still have them under the bed in our rig.

Secondly, we did as someone has already posted - shut down all of the power (shore and battery) - and the thing reset itself and we have had no further issues - touch wood!!

Good luck!

[2slick]

I went through this last winter. I had to replace the board in our Suburban furnace. We have the Dometic Comfort Control thermostat. Merely turning the thermostat off and back on will reset gas valve lockout. The blower must close the sail switch circuit, which is in series with a high temperature limit switch. Then the electrode must prove the flame. If you’re up to it....pretty simple to bench test the furnace.

[SJW]

My furnace is also not responding. First I figured the sail switch is jammed, and then I think I burnt the circuit board out, before the board went, it was blowing cold air and trying to light but not getting anywhere, and then after several tries, it stopped coming on all together