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Shiraj
Community Member
since ‎04-18-2025
‎04-26-2025

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I have a Honeywell THX9421R5021WW. It does use wifi. It only has 2 wires R and C. The C wire is white and seems to be powering the thermostat. The R wire is red. I want to replace it with a nest 3rd gen. Is this possible. Thanks.