I have purchased a Google Nest Thermostat and want to replace a four
wire thermostat that supports an existing forced air heating and cooling
system.Do I now hook the blue (thermostat) wire up to the Y designated
cooling terminal on the nest?
I have a current four wire thermostat originally installed for heat
only. AC was added and the existing blue wire was used for the cooling
unit and connected to the “Y” terminal on the existing thermostat. Can I
now hook this blue wire to the “Y” con...
