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    flossyjane6's Avatar
    flossyjane6 Posts: 1, Reputation: 1
    New Member
     
    #1

    Aug 28, 2014, 08:25 PM
    What would cause a soft humming sound come out of a vent when the a/c isn't even runn
    A vent in the floor of my guest bathroom has had a soft humming sound coming through it. The A/C will NOT even be running when I hear this humming. It is the only vent making this sound. I thought maybe it was the toilet, but everyone is saying it is the vent. HELP!!
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
     
    #2

    Aug 29, 2014, 05:34 AM
    Any sound coming from the air handler? Duct work can transmit noise as well as air?
    bitters's Avatar
    bitters Posts: 348, Reputation: 12
    Full Member
     
    #3

    Aug 29, 2014, 02:43 PM
    You might be hearing the transformer in the furnace.

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