Hi MarkI installed this Nest stat several months ago and didn’t have
any concerns until the temps dropped. This is when I found that the aux
heat was not working. With the wiring shown in the pic has worked well
for heat pump heat and cooling, just ...
Hi Marki set up the nest as you had shown and now I am getting an E73
error. I had previously had this nest installed but the aux heat did not
work, but everything else did