Google Nest Community

JD83 · 10-24-2022

I have a Nest 2 that has served me well for years. (I have a 3rd gen on the way). I moved to a new place and brought my Nest with me. I have a single stage Trane heat pump with single stage electric aux/emergency heat.My existing thermostat that work...

JD83 · 10-25-2022

Thanks! I confirmed with the wire tests that O needs to be energized for cool.My new 3rd gen learning thermostat came in today and I connected it the same way and it works correctly with heat, cool and aux. I guess the old one finally failed.

JD83 · 10-24-2022

Your wiring is compatible with the Nest Learning Thermostat but not the standard Nest as it only has space for 6 wires.The X2 wire will go to * for emergency heatThe W wire will go to W2/Aux for aux heatYour B will go to C as it's the common wire(Whi...

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