08-21-2023 06:24 PM
Troubleshoot RH wire not connected
08-21-2023 08:13 PM
The R wire that was attached to your old thermostat is what is connected to the Nest R, Rc or Rh. You say your Rh wire is not detected or it is not providing 24VAC power to the Nest Learning Thermostat?
AC Cooling Wizard