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SharonL778
Community Member
since ‎07-10-2023
‎10-05-2023

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Attached is the old wiring using a Honeywell thermostat. The house has a gas furnace and AC and doesn’t have a heat pump, why it uses a O/B wire in the attached pic? I tried to use OB wire in Nest thermostat and it has been working for cooling but no...
My house uses a gas furnace for heating and an air conditioner for cooling. It used to have an old Honeywell thermostat (wired G/Y/OB/R). After I replaced it with Nest Thermostat, the cooling (AC) worked fine. Summer is gone and now I notice that the...
My house uses an old gas furnace for heating and an air conditioner for cooling. No heat pump as far as I know. I follow the nest thermostat installation instruction carefully, twice, but the HVAC system still blows hot air not cooling. Pls advise if...