Answer
Nov 19, 2025 - 12:55 AM
Not having the pin out diagram for your original thermostat, it's hard to say for sure.
You likely need to:
You likely need to:
- Connect RED/WHITE and BLUE/WHITE to your RV's 12V power supply (not to the red/blue on the 9-pin)
- The 9 wires from your original thermostat go to the 9-pin connector based on function. But your old thermostat might have input and putput wires on the same connector. So be very careful here.
- The WHITE (low gas heat) and ORANGE/WHITE (high gas heat) go to your furnace control board
Do NOT just connect same colors together without understanding what they do. Connecting an output to an input could damage the thermostat.
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