Atwood furnace will not shut off

[kk008]

My 2016 33rsks whitehawk Atwood furnace started to do a strange thing today. It is trying to come on and the fan keeps blowing out air. It makes a clicking noise while trying to come on. I did turn it on and the clicking stopped. When I try to turn it off the fan keeps blowing. I can pull the 20 amp fuse to make it stop but ithen the ac does not work. Both are on the same Coleman mach control thermostat thing on the wall. Any help on disconnecting just the furnace until I get it in the rv shop? I have a couple trips booked and need the ac but not the furnace. Also any ideas as to what has happened? Thanks

 

[Route 66 Traveler]

Is your thermostat set to Auto?

 

[kk008]

No , here is pic of the thermostat. It is set to off and this is has it always set on the fan setting.

 

[Route 66 Traveler]

The way you have it set in the photo the fan will always run when the system switch is moved to any of the selections except for OFF. Try it on AUTO.

 

[JFlightRisk]

That's like our T-stat. We also leave the fan on AUTO HI, and switch between A/C and HEAT as needed, like Route 66 Traveler said.

 

[kk008]

The way you have it set in the photo the fan will always run when the system switch is moved to any of the selections except for OFF. Try it on AUTO.

Thank you but the fan is set on auto lo and the system is off. The problem is the furnace is trying to light and heater fan is blowing constantly even with these settings. When I switch the setting to heat it comes on but when I turn it off the fan keeps running. I cannot get the fan to stop or furnace from trying to light

 

[Route 66 Traveler]

Slide the fan selector all the way to the left.

 

[kk008]

Thank you again but all the way to the left is just auto high. The problem occurred when we were outside cleaning the camper and heard the furnace clicking trying to light and fan blowing at same time . No one had messed with the thermostat. I will slide it all the way to the left tomorrow morning when I go back out but I don’t think that is my problem but I do appreciate your input.

 

[JFlightRisk]

Another thought, if you can get to the furnace, there's a reset rocker switch on the top side. You might try a reset and see if it takes.

It may also be a bad control board or fan relay. Perhaps a wire shorting to ground.

 

[kk008]

Thank you if I can get to it I will look for that