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maillemaker's avatar
maillemaker
Explorer
Mar 11, 2017

Need help wiring Honeywell CT31A1003 thermostat

I have a 1990 Winnebago Warrior. I am rebuilding the bathroom wall, and had to remove the thermostat to do this. I was CERTAIN I took a picture of the wires before removal, but now cannot find the...
trailerbikecamp's avatar
trailerbikecamp
Explorer
Mar 12, 2017
You also need to know which furnace and AC system this controls. The manual should tell you exactly where the wires go. Had this issue with a new t-stat and furnace last summer. Furnace had been removed due to dead mouse inside it. Nothing was marked. Looked up manual for furnace online. After that just followed the wiring diagram. Turned 2hrs troubleshooting into a 20 min job.

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