Google Nest Community

What are the details of the Nest Thermostat?how did you acquire it? Were you the owner that initially set it up?The normal set up of a Nest Thermostat is to use the Nest App to set it up. That process registers the Nest thermostat to that Nest App an...

The black wire is not common. The black wire is for the reversing valve on the heat pump it cannot be the common