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Thread: Ptac mold smell

  1. #1
    Join Date
    Sep 2010
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    Ptac mold smell

    So I have a customer that has about 40 ptac wall ac units. This one particular seems to hold a mold/mildewy scent. The maintenance guy said they clean it every month to try to keep the smell down. I do not know if they are cleaning with chemical like coil cleaner. So I am on here to ask if you all know of a good product to spray on the unit to keep the mold down and also the scent. I believe it’s building up on the blower wheel like a minisplit.

  2. #2
    Join Date
    Dec 2016
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    NE Ohio
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    I've had good luck with PTAC UV germicidal lights as well as Ionizers, Nu-Calgone and RFG both make products that would probably work.

    http://www.nucalgon.com/products/iaq/iWave-F
    http://www.nucalgon.com/products/iaq...m-air-purifier
    https://www.rgf.com/products/air/ptac-air-purifier/

  3. #3
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    Feb 2004
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    It might be that the condensate isn't draining well. Mold smell can be a symptom of a bigger problem.
    You could check for any standing water inside or a mouse.
    I should have played the g'tar on the MTV. MK

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  4. #4
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    Nov 2006
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    Quote Originally Posted by hvacker View Post
    It might be that the condensate isn't draining well. Mold smell can be a symptom of a bigger problem.
    You could check for any standing water inside or a mouse.
    This includes checking the slope of the unit and the "outdoor" half of the unit. I've seen them become loaded with sludge which prevents the indoor portion from draining.
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