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    rosie j's Avatar
    rosie j Posts: 1, Reputation: 1
    New Member

    Dec 23, 2016, 10:11 PM
    Installed New Thermostat No Heat
    I installed new thermostat , but no warm heat has four wires y, r , w and green, I did all of that, please help I am cold!
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
    Uber Member

    Dec 24, 2016, 06:45 AM
    What color wires were connected to what terminals on the old thermostat?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
    Uber Member

    Dec 27, 2016, 08:04 AM
    For those colors, I would say red is Voltage, Green is Blower, Yellow is Cool, and White is Heat.
    If I was to guess, I might connect Red, yellow and green and see if it cools(cooling compressor and blower)
    I would then try red, white, and green(heat and blower).
    Blower NEEDS to run on any setting. Air Handler connections will help Verify, and not a bad place to start. If not confident with Electrical and understand Shock Hazzards may be best to leave alone. Good Luck

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