I am installing my Nest Thermostat the blue wire connected to C is
generating a E9 error code I can't seem to find any next steps short of
calling a nest pro to come in, seems like I am close. Options??
I discovered the Blue wire was not connected on the furnace end I now
have it connected. Now my RH red wire does not have power (nothing
changed on that) Also no AC nor heat pump. Just gas furnace with a
blower
