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    maljjs's Avatar
    maljjs Posts: 1, Reputation: 1
    New Member

    Jul 27, 2006, 06:43 AM
    AC Buzzing noise
    My 2-yr old 12,000 BTU Friedrich wall AC unit started making a very loud buzzing noise recently. The noise does not occur in the "fan-only" mode, but starts about 1 minute after the AC is turned on. The noise is louder inside the house than outside the house, and seems more "electrical" in nature than vibratory. As far as I can tell, the cold air output is still OK, despite the noise, but I'm not going to use the unit again until I find out what the problem is. Thanks.
    rickdb1's Avatar
    rickdb1 Posts: 185, Reputation: 15
    Junior Member

    Jul 27, 2006, 03:41 PM
    Odds are the contactor which engages power to the compressor is going bad. It will "vibrate" as it tries to make/keep contact and make a buzzing noise. Have a tech. check it out. Not a major problem, but it needs fixing...

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