12 V heater fuse

[GaryCindy]

Thor Miramar heater fuse
I have a 2021 Thor Miramar 37.1 class A motorhome. I cannot locate the 12 V fuse the powers the red wire that goes to the back of the on off reset switch for the heater. I’ve checked all the fuses in the Power panel underneath the master bed, check fuses underneath the hood of the vehicle. Also all the fuses in the cab to the left of the steering wheel. Also the hidden fuse box underneath the dash behind the steering wheel and no fuses operated that are in the house battery compartment. Running the furnace now with a jumper wire directly from the house battery and the furnace works properly. Just need to locate the fuse the powers that red wire. Does anybody know where that heater fuse is?

[Jimbo56]

If you mean your coach furnace, find your electric center. Look for a fuse marked appliances. Maybe under the bed?

[GaryCindy]

Originally Posted by Jimbo56

If you mean your coach furnace, find your electric center. Look for a fuse marked appliances. Maybe under the bed?

Thank you
It is my coach furnace and I’ve checked all the fuses in my electrical center under the bed and it’s not any of those. They all tested with good continuity

[OldWEB]

One step is to log into Thor and download the wiring diagrams for your unit.
Another one is to obtain a wire tracer and work back from the furnace.
Maybe a loose connection inside (or behind) the fusebox.

Good Luck

[16ACE27]

Originally Posted by GaryCindy

Thank you
It is my coach furnace and I’ve checked all the fuses in my electrical center under the bed and it’s not any of those. They all tested with good continuity

Then you have a wiring problem. The appliances fuse supplies the furnace, thermostat, water heater and fridge.

[HarryTh]

On my Dometic, the red wire to the thermostat came down from the AC control panel in the unit on the roof.
Harry

[GaryCindy]

Originally Posted by 16ACE27

Then you have a wiring problem. The appliances fuse supplies the furnace, thermostat, water heater and fridge.

Thank you that’s some good information to work from

[GaryCindy]

Originally Posted by HarryTh

On my Dometic, the red wire to the thermostat came down from the AC control panel in the unit on the roof.
Harry

Thank you for your response

[GaryCindy]

Originally Posted by OldWEB

One step is to log into Thor and download the wiring diagrams for your unit.
Another one is to obtain a wire tracer and work back from the furnace.
Maybe a loose connection inside (or behind) the fusebox.

Good Luck

Thank you for your response. Could not find Thor’s website that would give me any wiring diagrams just sales information.

[SGilbert]

Originally Posted by GaryCindy

Thank you for your response. Could not find Thor’s website that would give me any wiring diagrams just sales information.

Try this: https://thor.mizecx.com/cc/cpSignIn.html