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

    Jul 20, 2012, 03:04 PM
    Air conditioner makes booming noise after shut off
    Out air conditioning unit is probably 25 years old and cools well. However, in the last few months it makes a booming noise when it shuts off? Any suggestions?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Jul 20, 2012, 05:24 PM
    Sounds like some ductwork iis "oil canning ". Have someone stand under the ductwork and listen for the sound. You can usually shift the ductwork a bit to realign the metal.
    luv2bowl300's Avatar
    luv2bowl300 Posts: 2, Reputation: 1
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    #3

    Jun 12, 2013, 04:57 PM
    What is "oil canning" (the ductwork ?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Jun 12, 2013, 06:12 PM
    Quote Originally Posted by luv2bowl300 View Post
    What is "oil canning" (the ductwork ?
    You posted a separate question. I answered there.
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