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  1. #1

    Noisy furnace (in 2 forums)

    I want to get into the industry and have been helping friends out, but this is the first time I'm dealing with the furnace rather than the AC unit. Can someone help me diagnose this problem? The furnace suddenly become very loud (makes a low rumbling sound) when the fan is turned on at the thermostat. You can view a cell phone video my friend posted of the fan here: http://www.youtube.com/watch?v=JZxxW...feature=colike. What do you guys think? I am probably going to recommend him getting a professional to do the job, but don't want him to get ripped off.

    Note: In the vid, He is pressing the door switch on, then off, then on again - it is not doing this by itself.
    Last edited by JamesH34; 08-16-2012 at 07:09 PM.

  2. #2
    Quote Originally Posted by 2sac View Post
    No DIY
    I am not planning to do this myself, but I want to help diagnose the problem to have an idea of what to expect when a pro does come out.

  3. #3

    Furnace rumbling

    A friends furnace suddenly started making a loud rumbling noise when the fan's turned on. Any ideas on what the problem is? Here's a vid: http://www.youtube.com/watch?v=JZxxW...&feature=g-upl. I am turning the fan on and off via the door switch.

  4. #4
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    I know exactly what it is. It needs a new part and a pro can get you the correct one.

  5. #5
    Thanks for your reply! Hmm, to me, it looks like the fan is a little off balance - is this what you're hinting at? If so, could this be because of dust buildup, or bad bearings in which case the motor just needs to be replaced by a pro? Like I said, I'm still learning and haven't dealt with this problem before, I'd like to know what you see.

  6. #6
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Thats not the sound of an unbalanced wheel. Its broke.

  7. #7
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,474
    Motor bearings or wheel. A sharp tech would have no trouble telling him which. Or both.

  8. #8
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    How many times do you have to post this James?

  9. #9
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,599
    Now just in 1 forum.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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