02-14-2025 01:40 PM
My trane heat pump, gas aux heat wires ( y2, f. X2. W1, s1. S2. Rc, R, o, y. G, b) the nest wiring (y1,y2,g, ob,rc,w1,w2aux,c,*,rh) which wire goes to what? Thx
02-14-2025 03:03 PM
@Veshragh
Yes, Trane is notorious for how they label their thermostats.
If you post a picture of the Tran thermostat's wiring, I'll help you figure it out.
The quick and dirty version is,
F - not used
S1 & S2 - not used
B - C
X2 - AUX or emergency heat. can be either * or W2
W1 - if AUX heat, then W2 or W1 if stage 1 heat.
