Pro1 wiring This is my current wiring on a Pro1 thermostat. I have a new
Goodman GPGM3 3 ton hybrid duel fuel package system, propane is the
auxiliary/emergency heat. I purchased a 4th gen thermostat, how do I
connect the wires.
I woke up to the same issue this morning, N 420, only code. Unit has
been working for months okay, last night was the first night to cycle
completely through the heating cycle. Used heat pump during day, cold
enough the alt heat turned on. There is n...
