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Thread: Furnace Making Noise When First Turn On

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    Member
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    Furnace Making Noise When First Turn On

    When I first turn on my furnace (on cold nights) the fan comes on and makes a real loud noise. After it runs for awhile it seems to be less noisy. It's almost like a loud fibration or maybe the fan itself needs replacing. I assume there are 2 fans in the furnace. One for safety to blow all gases out like I have on my boat and one for circulating through the camper, right? I've seen where the ball bearings on these fans when cold and worn out will produce this noise.

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    Senior Member
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    Re: Furnace Making Noise When First Turn On

    I had problem very much like what you have . Loud noise sounded like fan was running rough. I took the vent cover off. The fan was not turning easily. Kept turning it and dirt started falling out. Mud dabbers. Cleaned it out and all is fine.

    TC and KC
    2009 Sundance 2998RB
    2007 Chevy Classic CC 4x4 2500 HD Dmax

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    Senior Member
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    Re: Furnace Making Noise When First Turn On

    My bad, after re-reading your post I see it was the furnace--mine was the A/C.

    TC and KC
    2009 Sundance 2998RB
    2007 Chevy Classic CC 4x4 2500 HD Dmax

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    Senior Member - Past Moderator Ray LeTourneau's Avatar
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    Jan 2006
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    7,678

    Re: Furnace Making Noise When First Turn On

    clay1969, I wish I could help but you may have to pull the furnace and check for maybe a bad fan motor. If you're not comfortable doing this on your own or your rig is still under waranty, it may be time for a trip to the dealer.
    Ray & Lin
    R.I.P. Suzi
    R.I.P Bart


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