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    tkb9595's Avatar
    tkb9595 Posts: 1, Reputation: 1
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    #1

    Mar 29, 2008, 06:08 AM
    Comppressor motor hums, no start
    Goodman heat pump, it hums but will not start, voltage present.
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #2

    Mar 29, 2008, 07:24 AM
    Quote Originally Posted by tkb9595
    Goodman heat pump, it hums but will not start, voltage present.
    Often a compressor does that if it is reconnected to soon after compressing (for instance after a short power cut). Once running the compressor builds up a high pressure in a gas without a sweat, but it (often) fails the power to start compressing in an already high pressure state. So keep the compressor off for half an hour after running. After that period it should restart without any problems. If not the compressor is faulty.
    I hope this helped you.
    ;)
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Mar 29, 2008, 07:29 AM
    Or it could be a run capacitor/start relay/start capacitor/burnt wire terminal/etc. Check the compressor terminals for grounding and correct impedance.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #4

    Mar 29, 2008, 07:41 PM
    If all checks out and its not starting(and you do not have a start assist for the compressor) you can add a super boost kit to help the compressor start.
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