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

    Jul 16, 2009, 02:22 PM
    It sounds like distant thunder coming from the Furnace unit!
    I have a trane AC/heat pump unit, and a Trand XE80 furnace.

    * The AC is running and all of the sudden it sounds like distant thunder where the heater is at? A fan issue?
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Jul 16, 2009, 03:52 PM

    Possibly fan. I would take covers off and get a closer look to find where the noise is originating from.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #3

    Jul 16, 2009, 07:39 PM
    Does it still do the thunder?
    All the time or at start up or shut down only

    Like dad77 said pull the cover and do a visiual look see
    If it does it all the time ,feel inside the inside if blower cage, maybe a piece of paper or dead varmit throwing the blower cage out of balance
    siberianair's Avatar
    siberianair Posts: 360, Reputation: -4
    Full Member
    		  
    #4

    Jul 17, 2009, 05:02 AM

    Change your filter... if your filter is dirty the unit will try to pull air from anywahere and can cause thunderlike sounds at startup an dshutdown.
    danielnoahsmommy's Avatar
    danielnoahsmommy Posts: 2,506, Reputation: 297
    Ultra Member
    		  
    #5

    Jul 17, 2009, 05:04 AM

    My parents had the same issue last year, they had to have a part replaced. To be on the safe side I would contact a repairman to come out and have a look
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