Question/problem with furnace in '06 Actic Fox 860

I have an AF also, and had the same problem turned out to be the thermostat. The stock thermostats are pretty crappy and failed. Check that closely you may be chasing your tail.

07IDCLASSIC wrote:
...Have power to the black wire running to a gray box but I'm betting that is for the 120 plug in not too far away....

...

The grey box w/black cord and romex SHOULD be 110v circut-not part of heater or any other 12v circut. Couldnt help but note the use of cover typicaly used on exterior raintight box, odd, thats an expensive cover for a junction box? Common on an A/F?

Dont know what a 'ticker' is but there should be 12v at the (correction) red wire connection that goes INTO heater, (blue wires are t-stat). If not then I would verify 12v out at fuse panel. I would start out assuming simplest-no power getting to heater.

Second would be thermostat or wiring to it. I would as suggested remove wires from t stat and tie together. If fan doesnt come on imediatedly it will as soon as (if) a bad connection/lack of power somewhere else is found. IE the mentioned plug if you have one, between slide and camper, could be obvious source of fault.

If 12v out at panle, I would pull wire loose at panle & check continuity between that end of the red wire and end of wire at heater. Again mentioned was a plug.

If power at red wire to heater, and wires Disconnected from t-stat and tied together, last thing I'd check is jumping t-stat wires at heater to verify no break in leads to t-stat. If theres power and t-stat wires are connected then its into the heater itself.

I have lights and everything. Stereo everything else works that I've tried anyways. I have the batteries in the garage on a battery tender is why they aren't in the camper. I haven't taken the thermostat a part yet.

Do you have other 12v in the camper , lights etc. ?

Did you check the thermostat ? Remove 2 wires from thermostat and hold together . Anything ?

Not all converters supply 12v without batteries .

So I got to mess around a tiny bit with it today. Propane tanks should be pretty much full. Pulled the seat cover and the wood covering the furnace. Have power to the black wire running to a gray box but I'm betting that is for the 120 plug in not too far away. All of the other wires running to the furnace have no power. Now the batteries are out but the camper is plugged in and does have power and power was checked using a tick tracer. Fans did not kick on or anything. I'm guessing I need to get the slide out and trace the wires under there. Any other options? another pic of kind of what I'm talking about.

Could be low propane pressure. I've replaced two regulators in nine years and carry a spare in case I need it.

Thanks guys for all the responses. Been busy working on the house the last couple days but I will let you guys know what I find this week. Again thanks for all the help!

The '05 AF 990 is also a NT 20, 20K BTU furnace.

travelnutz wrote:
Isn't a 25,000 btu furnace awful big for a 8'6" TC? Most have 15,000 to 18,000 max and some even had 12,000 and even that size will bake you in zero F temps.

A little over 80 sq ft to heat!

True, im looking at my 04' AF 860 invoice/brochure , its actually a 20k furnace. Whatever model that is , NT 20 I guess .
It looks like the AF 811 is also a 20k furnace .

Isn't a 25,000 btu furnace awful big for a 8'6" TC? Most have 15,000 to 18,000 max and some even had 12,000 and even that size will bake you in zero F temps.

A little over 80 sq ft to heat!