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Vikram2
Community Member
since ‎02-23-2023
‎02-24-2023

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Error Code N72 with Grey Display of Rh (Heat Power) caused by flipped wires at Zone Valve

02-23-2023
I installed a New Google Nest Learning Thermostat Version-3 yesterday, and got Error Code N72, suggesting to check Battery &/or Connection to Furnace. I could NOT find any Batteries in this Thermostat, but checking the wires of the Zone Valve connect...