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    republic17's Avatar
    republic17 Posts: 4, Reputation: 1
    New Member
     
    #1

    Aug 4, 2013, 09:35 AM
    Air handler noises
    I have a 7 year old carrier central airconditioner.

    In march, 2012 all Freon tubing and copper lines were replaced. In dec. 2012
    A motor module was replaced. Since these events, we hear a "mini" explosion
    In the air handler once a day and only during air conditioning season.

    Could there be a bubble in the Freon lines?

    Any help would be appreciated. My service company is stymied.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Aug 4, 2013, 05:59 PM
    Is the source of this sound coming for the outdoor unit or the indoor?
    republic17's Avatar
    republic17 Posts: 4, Reputation: 1
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    #3

    Sep 6, 2013, 12:12 PM
    Indoor
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #4

    Sep 6, 2013, 05:36 PM
    Are your ducts metal & do you hear this noise either when the fan first comes on or just after it shuts off?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #5

    Sep 6, 2013, 06:15 PM
    Sounds like "oil canning " of the duct. Have someone listen along the duct as the unit cycles. You can usually correct by hitting the duct with a rubber mallet in the area where the noise occurs. This rebends the duct.
    republic17's Avatar
    republic17 Posts: 4, Reputation: 1
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    #6

    Sep 7, 2013, 04:45 AM
    The noise is coming from the air handler, which is in the garage. It occurs once a day, a loud slamming noise, usually towards the end of the day.
    republic17's Avatar
    republic17 Posts: 4, Reputation: 1
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    #7

    Sep 7, 2013, 04:46 AM
    Quote Originally Posted by ma0641 View Post
    Sounds like "oil canning " of the duct. Have someone listen along the duct as the unit cycles. You can usually correct by hitting the duct with a rubber mallet in the area where the noise occurs. This rebends the duct.
    It's definitely not coming from the ducts.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
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    #8

    Sep 10, 2013, 07:40 PM
    Noises can be difficult to find & fix in person. Trying to fix one online is nearly impossible especially if it only happens once a day
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #9

    Sep 10, 2013, 07:45 PM
    Is the unit running or just turning on or off? Still sounds like ductwork, perhaps in the return. Filter clean? Dirty filter causes negative pressure in the air handler. There is nothing in the air handler except a filter and ductwork. Check the filter mounting.

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