See attached pic:
In compatibility checker it states I need support. Not sure how to wire to nest. Appreciate any help
I have starting clockwise on picture: G, O, X2, B, W, U, R, T, Y.
W and U have a soldered bridge.
My understanding is X2 is for Emergency heat, and T is often used for outside sensor. Neither are in the app for setting up nest. Regardless without those configured for X2 and T the app doesn't like just G, O, B, W, R, T. U
Your current thermostat is only compatible with the Nest 3rd Gen Learning Thermostat.
This is how I would wire it.
Blue - B to C
White - W to W2 (set as AUX heat)
Red - R to Rc
Brown - T not used
Yellow - Y to Y1
Green - G to G
Orange - O to OB
Black - X2 to * (set as Emergency heat)
Hi Patrick, I have a dual fuel system, used your wiring instructions and everything worked except for gas furnace, so switched (*) to alt heat stage 2 and when testing gas furnace did turned on, not sure if emergency heat is going to work or not but I don’t think I need it, before when too cold stage too would kick in and heated pretty quickly. So I think this should do it. Thanks for your help, it helped a lot
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