Wondering the same thing. If the c-wire is from the air conditioner, and
that's switched off for the season, then the thermostat might not be
powered if it works the way (which of course I cannot verify with
Google). Might work for a while till the b...
Thank you, this is very helpful and 100% in line with what I am
experiencing with a newer thermostat. I get the error, but heat still
work and AC. But it does appear that the Air Conditioner power must be
on to continue to provide power to the thermo...
GS1, my thermostat is new (last month or so) exhibiting the n72 error.
If the new one you get corrects it, please let us know. I felt the
support person I worked with was really trying, but wasn't told how the
product actually works either. Also, sin...