“Can this be wired with 4 wires or does it have to have the "C" wire hooked up?”

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• I didn't use C wire. It is battery powered also

  Answered by Sarikasap 5 years ago

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• Nest Learning Thermostat can work with a 4 wire and even as few as a 2-wire, 24V HVAC system. We recommend using the Compatibility Checker tool on our support page to check if your system is compatible with the Nest Learning Thermostat. You can learn more about the Compatibility Checker tool here: https://support.google.com/googlenest/answer/9246656

  Answered by Nest Support 5 years ago

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