Just moved into a new house and I'm trying to wire an Ecobee 3. I pulled off an old Honeywell Lyric T5 “smart” thermostat and noticed that there was no Ground wire
Installing new T5 Honeywell Home thermostat. No power on new thermostat : r/hvacadvice
Old thermostat works, but I can't get the Honeywell T9 to work. T9 require C Wire that was not in the wall. I added C wire & RC wire via plug-in 120v
Installing new T5 Honeywell Home thermostat. No power on new thermostat : r/hvacadvice