“My thermostat has 7 wires, the nest has only 6 connection portals”

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• we have 7 wires... one being a "U" terminal... it's for ventilation of outside air to be mixed in with the inside air and from what I can see Nest is not compatible with a 7 wire system.

  Answered by Anonymous 3 years ago

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• Check your heaters wiring For either a redundant ground or a redundant positive That should be piggyback at the thermostat

  Answered by Marco 4 years ago

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• Nest Learning Thermostat may be able to support your 6-wire heating and cooling system. However, we recommend checking the Compatibility Checker tool on our support page to verify if your heating and cooling system is compatible with Nest Learning Thermostat. Check out this link: https://store.google.com/us/widget/compatibility/thermostat

  Answered by Nest Support 4 years ago

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