Furnace not working please help

[charlesdennis01]

This morning I woke up to a frezzing camper. We are full time campers 🙂 and we are connected to power 24/7. The furnace was working fine last night but this morning it wasn't. I can hear the clicking noise from the thermostat but fan or furnace doesn't come on. I checked the output and no obstructions, have check the propane, tanks are full (100 pounds tanks), all 3 burners come on with good flame. Can I get some help, I have to fix it my self because I can't move the camper

[drsteve]

Ask at the camp office about a mobile tech, they know who the good ones are.

[midnightsadie]

might try that mobil tech. or go buy some electric heaters.

[charlesdennis01]

Thank you for all the tips looks like one way or another I'm gonna have to wait until Monday to get anything done because most places will be close on the weekend to get parts. Again thank you for everyones help

[midnightsadie]

you might call a mobil tech they,ll come to you. if your not 100% sure of what your doing. you could make things worse. buzz sound could be fan motor froze up. good luck.

[enblethen]

Wiring diagram in this manual. Use test light to follow power or lack there of.
Manual
Check for fuse on circuit board.

[charlesdennis01]

westend wrote:
Download your furnace's service manual and troubleshooting chart here: Bryant RV service manuals

A buzz may indicate a failed relay, stuck sail switch, or blocked blower. Roll blower over, mechanically. Check input and exhaust on exterior for insects, leaves, etc. Move sail switch, mechanically and make sure it travels without sticking. When the thermostat calls for heat, the first step is operating the blower to exhaust any gasses and to insure air and exhaust can flow into combustion area.

The make is from Atwood and the model from the sticker in the furnace reads AFMD35121_ _ A is a 35K BTU-HR

[charlesdennis01]

charlesdennis01 wrote:

enblethen wrote:
Did you try spinning the fan by hand?
Look for a small time delay relay mounted on the fan housing. Inspect it for black burnt area.
Verify 12 volts DC to relay
Do you have exact make and model?

I took a picture of the sticker on the furnace and is model AFMD25121_ _ A is made by Atwood hydro flame

I took the panel off from under the fridge and getting the process started to get the furnace out, I don't have and outside panel to access so have to do it the hard way. Do I have to unscrew the small vent outside first or can I pull the furnace with having to remove the small vent outside

[charlesdennis01]

enblethen wrote:
Did you try spinning the fan by hand?
Look for a small time delay relay mounted on the fan housing. Inspect it for black burnt area.
Verify 12 volts DC to relay
Do you have exact make and model?

I took a picture of the sticker on the furnace and is model AFMD25121_ _ A is made by Atwood hydro flame

[westend]

Download your furnace's service manual and troubleshooting chart here: Bryant RV service manuals

A buzz may indicate a failed relay, stuck sail switch, or blocked blower. Roll blower over, mechanically. Check input and exhaust on exterior for insects, leaves, etc. Move sail switch, mechanically and make sure it travels without sticking. When the thermostat calls for heat, the first step is operating the blower to exhaust any gasses and to insure air and exhaust can flow into combustion area.

[enblethen]

Did you try spinning the fan by hand?
Look for a small time delay relay mounted on the fan housing. Inspect it for black burnt area.
Verify 12 volts DC to relay
Do you have exact make and model?

[charlesdennis01]

MrWizard wrote:
Is the fridge on propane?
The water heater?
Do the stove burners work?

LP regulator might be froze up,
What was the overnight temp?

The heater fan should come on an do a Purge blow before the burner lights
If the fan does not come on, it's either a power problem or a control board problem, could be a bad connection to ground..rtc

Thank you for the respond and have checked the propane as well, everything that works with propane works including the fridge, I have bypass the thermostat and still getting the same buzz noise when turning the heater on.

[MrWizard]

Is the fridge on propane?
The water heater?
Do the stove burners work?

LP regulator might be froze up,
What was the overnight temp?

The heater fan should come on an do a Purge blow before the burner lights
If the fan does not come on, it's either a power problem or a control board problem, could be a bad connection to ground..rtc

[charlesdennis01]

Any more helpful tips on what could be wrong, I just tested the wires, the thermostat is good, furnace still not working

[charlesdennis01]

joebedford wrote:
Propane tanks empty?

nope have a 100 pound tank and is full