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Thread: Need Help - Complex Nest Install.

  1. #1
    Junior Member

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    Need Help - Complex Nest Install.

    I had a professional HVAC guy install my nest but he really doesn't know much about the Nest Thermostat and I need help.

    I have attached my old thermostat wiring, the actual electric heat-up board, the current nest wiring and what my nest displays with the current settings.

    I don't have a gas furnace. Everything is electric.

    Let me know what else I need to provide to you.
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  2. #2
    HVAC Thermostat Specialist

    User Info Menu

    Well that is all wrong based on the old thermostat wiring.

    Move Red wire from W1 to Y1
    Move White wire from Y1 to W2
    Move Blue wire from W2 to *

    Thermostat will need reprogrammed also. I can not help with that... I would need to go through it with you step by step.

  3. #3
    Junior Member

    User Info Menu

    What exactly do you mean by reprogrammed. Doesn't the nest automatically detect and reprogram itself when I put it back on the wall? I know there are a few settings like fuel source and dual or single source heating I can choose on the next setting.

    It keeps saying alt heat stage 2. So I knew something was wrong, but I thought the guy had an idea of what he was doing.

    Thanks,

    Much appreciated.

  4. #4
    HVAC Thermostat Specialist

    User Info Menu

    NO, it does not automatically choose the correct program/setup based on wiring. The same wiring could be used for a different type of system. You have a heat pump with aux heat (2H1C). Your aux heating source is electric. * needs to be used for Emergency heat.


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