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Thread: Carrier to Nest 2.0 Thermostat

  1. #1
    Junior Member

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    Carrier to Nest 2.0 Thermostat

    I have the Carrier TSTAATCCPRH01-B Thermidistat and i am wanting to change over to the Nest 2.0. I have a problem with the wiring though. On my thermidistant it has a wire in the S1 spot and the Dhum spot. I don't think I have a dehumidifier and i need to know if anyone can help me wire it to the nest

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  2. #2
    HVAC Thermostat Specialist

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    S1 is only valid when S2 is used, it's for an outdoor tempature sensor. The dehumid terminal may be set up to lower the blower speed in cooling mode during high humidity conditions. Without knowing whats on the furance side there's no way to tell.

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