Answer
Jan 29, 2026 - 06:50 AM
Probably not as a drop-in.
A “3-wire” RV wall thermostat that runs both A/C and furnace is usually part of an RV-specific control system (commonly a Coleman-Mach or Dometic/CCC style setup) where the wall control is basically a remote control / logic panel, not a simple rv thermostat. Those systems can run a lot of functions over just a few conductors (data/low-voltage signaling), which is why you only see 3 wires.
The GE Appliances RGRWT2B is typically a standard low-voltage RV/“house-thermostat style” control (it expects dedicated terminals like R, W, Y, G, etc.), and those usually require more than 3 conductors unless your coach has extra wires tucked in the wall.
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