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Thread: air conditioning vibration

  1. #1
    Join Date
    Sep 2004
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    51

    air conditioning vibration

    when the ac turns on, it creates a vibration that you can hear and feel through the air box. it was a new compressor, but replaced under warranty to rule it out. oil level in the system is perfect, and refrigerant charge is perfect. Pulled and cleaned the orifice tube. there is absolutely no air in the system. I'm a licensed mechanic, so i can do all my own work, but I've never experienced this before. anyone have any ideas?


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  3. #2
    Cadillac Giovanni's Avatar
    Cadillac Giovanni is offline Cadillac Owners Enthusiast
    Automobile(s): 86 DeVille (RIP), 89 Brougham D'Elegance, 95 FWB
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    Re: air conditioning vibration

    No idea at all. What car is it on? I'll check my maintenance manuals when I get home, maybe they mention this in the troubleshooting section.

  4. #3
    Join Date
    Sep 2004
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    Re: air conditioning vibration

    84 fleetwood brougham 4.1L

  5. #4
    csbuckn is offline Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
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    One of the vent doors vibrating?

  6. #5
    Join Date
    Sep 2004
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    Re: air conditioning vibration

    no, u can actually feel it when you hold the ac hoses under the hood, so its transmitting through the system..

  7. #6
    SafariOne is offline Cadillac Owners Fanatic
    Automobile(s): 1981Cadillac Fleetwood Brougham D'Elegance Coupe m
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    Re: air conditioning vibration

    Got to be the fan motor or bearing as that is the only thing spinning.

  8. #7
    Join Date
    Sep 2004
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    Re: air conditioning vibration

    wouldn't be the fan, cuz even when its on low the vibration and noise never changes. it's had me scratching my head on what it could be lol.

  9. #8
    csbuckn is offline Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
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    May have to poke around with an auto stethoscope to pin point the location of the noise.

  10. #9
    804fleetbro is offline Cadillac Owners Member
    Automobile(s): 1980 Fleetwood Broham
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    May 2013
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    Re: air conditioning vibration

    what about a loud squealing happening when I turn my ac on? sounds like a belt but all are ok. 1980 Fleetwood bro?

  11. #10
    Join Date
    Sep 2004
    Posts
    51

    Re: air conditioning vibration

    loose belt, hardened/glazed belt or compressor crapping out probably
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