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How to Wire Up a Heat Pump Thermostat?

heat pump thermostat wiring e1565349043139

We have many people ask the question how do I wire my new heat pump thermostat? How do I troubleshoot my heat pump thermostat? What do the wire colors mean? What are the functions of the wires and the colors? What do the terminals on the thermostat mean? How do I wire up the auxiliary and emergency heat? Do you have a Youtube video that shows heat pump thermostat wiring explained? Below we have an excellent Youtube video Made by AC Service Tech that answers all these questions. If you have any questions please email us anytime. Our email address is

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2 thoughts on “How to Wire Up a Heat Pump Thermostat?

  1. I have a communicating module (Vg and V+)
    Have AC/Furnace/Humidifier, connected to the communicating module.
    Trying to replace the non smart thermostat with a honeywell smart wifi TSTAT
    Can i connect C wire to V+ to power up the new smart thermostat?

    1. Hi Gopal! I am very sorry, that I am not familiar with the thermostat you have and I am not familiar with the Honeywell thermostat that you are installing. I can only suggest that you read the thermostat instructions or call Honeywell customer support to find out the answer. Steve

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