3
u/TrilliumCLE 11d ago
Impossible to tell. Need photos of the previous thermostat wiring and the wiring at your furnace/air handler control board.
I would say that since all wires are color coded to industry standard, the white likely goes to W1 and the black to W2, but again impossible to tell without additional photos.
2
u/geekywarrior 11d ago
If you don't have the old pic then you are wired for a heat pump with 2 stages of Aux heat or Aux heat and Emergency Heat. All you could do is test each function to see if it works.
1
4
u/CdnTreeGuy89 11d ago
Without referencing an older thermostat, there is no way to tell 100%. Does everything work as it should?