“My old stats use only two wires for heating . Can I use the Nest stat ?”

1-5 of 5 Answers

• You can use the Nest thermostat in this case but only one thermostat without a C wire. If you have a second thermostat, you will need to run a common. The charging cycle of the Nest thermostats may draw too much for more than two 2 wire thermostats.

  Answered by Joey 6 years ago

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• I don't believe you can. They had a warning saying that you need the thermostat with multiple small wires.

  Answered by Henrique 6 years ago

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• Depends what the 2 wires go to.

  Answered by SW178 7 years ago

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• I just installed the NEST and my gas heater has only two wires. The wires for my installation has a heat wire, an air conditioner wire, a common ground wire, and the hot electrical lead.

  Answered by Rono 7 years ago

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• The Nest is compatible with two wire systems. You can check for compatibility here: https://nest.com/support/article/How-to-tell-if-your-heating-and-cooling-system-will-work-with-the-Nest-Thermostat

  Answered by Nest Support 7 years ago

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