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    kathyu's Avatar
    kathyu Posts: 7, Reputation: 2
    New Member
    		  
    #1

    Aug 6, 2014, 05:26 PM
    Condenser on ac unit
    Why is my capacator making a buzzing sound and vibrating when the fan starts.. is it normal or okay?
    WallyHelps's Avatar
    WallyHelps Posts: 1,018, Reputation: 136
    Ultra Member
    		  
    #2

    Aug 7, 2014, 04:10 AM
    I would check to see if it is securely fastened to the unit. Perhaps it is simply mechanical vibration. If so, it's probably OK (I'd still tighten it). If it is something else, it's probably something to look into. How old is the condenser unit? Is the capacitor swollen? Replacing the capacitor is relatively inexpensive and might take care of the problem (if it is not simply loose).

    Good luck,
    WallyH
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #3

    Aug 7, 2014, 01:10 PM
    Capacitor? Sure it's not the contactor?
    bitters's Avatar
    bitters Posts: 348, Reputation: 12
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    #4

    Aug 7, 2014, 01:16 PM
    I agree with ma0641, never heard a cap buzz.
    kathyu's Avatar
    kathyu Posts: 7, Reputation: 2
    New Member
    		  
    #5

    Aug 10, 2014, 05:59 PM
    It's older. And definitely the round metal capacitor. Vibrating when the fan comes on. Only for 3 or 4 seconds.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #6

    Aug 10, 2014, 06:07 PM
    Then it is probably loose in the bracket.
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