I'm sure this is a rather common question, but I can't find a definite
answer.Possible, not possible? If possible, then how? There is a 'star
O/B' connection on the nest, but this only takes a single wire. Help!
Honeywell thermostatNest thermostat
I climbed in my attic (we have a 2nd furnace up there, which is the one
I'd like to control with the Nest thermostats). This furnace is
single-stage (Goodman GMES96). I do not think there is a heat pump
involved (there are two A/C units outdoors, we ...
Hm, actually, I'm having some doubts... "B" is an ambiguous label... I
don't have a Blue wire, I have a Brown-ish wire... "C" means neutral,
while Brown seems to be about 2nd stage heat (or backup heat)?This being
said, this wire is clearly labeled "...
I think I found the answer in an older thread:<<[...] connect the wires
the same as the old tstat but put red to RC, orange to O/B, and blue to
C. then Y G W.Tell it you have a heat pump system with forced air
ductwork (i assume that is what you have...
