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Old 10-24-2017, 05:37 PM   #1
Join Date: Aug 2016
Posts: 61
Help! No pwr to thermostat FR3 30DS

Help! We are in Indianapolis for our first cold night and the thermostat wonít turn on!

We have propane to the stove. Iíve checked the breakers in the bedroom and the two fuses that have any thing resembling a/c. Wires are on the back side of the furnace.

Whatís next?

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Old 10-24-2017, 05:54 PM   #2
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Thermostat power, 12VDC, normally comes from the furnace. Check for power to it. No idea which fuse or circuit it might be on for you coach.

Most of the time the wiring is the same as at home but 12 VDC rather than 24VAC. Power should be on the R terminal and ground/return on the B terminal. For heat you need 12VDC on the W terminal. In a pinch you could jump R to W to get heat if you have 12VDC but the furnace will run none stop until you pull the jumper. A bit easier to head out and buy a 1200 watt electric heater.

2006 Hurricane 31D built on a 2006 Ford F53
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Old 10-25-2017, 05:40 AM   #3
Join Date: Aug 2016
Posts: 61
The sad update:

We wrapped up in blankets and were (mostly) comfortable for the night.

The thermostat is a combination unit shown in the manual in the installation of the Atwood a/c unit. Someone suggested that there might be a fuse inside it but I havenít figured out how to get it open.

I switched over to a different electrical plug outside and checked more fuses to no avail. Any suggestions would be appreciated.
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