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justs
Community Member
since ‎08-07-2022
‎08-14-2022

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e79 Error

08-07-2022
I have read all of the e79 error threads here and a couple dozen others around the web with no luck. I have two Nest thermostats and suddenly 3 days ago the one upstairs showed an e79 error message, no power to C wire. Nothing changed so I don't know...