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    dragon43052's Avatar
    dragon43052 Posts: 2, Reputation: 1
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    #1

    Jan 18, 2009, 07:43 AM
    Heat pump not heating
    I have a tempstar heat pump It uses both gas and electricity to heat and cool. I put a new Honywell thermosta RTH6300B on the unit, now I don't get any hot air only cold. This I a four wire unit, red, white yellow and green. Anyone know why it won't heat, was working before but fan did not work that is why I put on new thermostat now fan works but no heat thanks for all the help
    dac122's Avatar
    dac122 Posts: 463, Reputation: 17
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    #2

    Jan 19, 2009, 07:21 AM

    What's the old thermostat make/model and what wire colors were hooked to what terminal labels on it?

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