Weird noise, is it a fan?

Discussion in 'iMac' started by bazeboiee, Apr 23, 2017.

  1. bazeboiee macrumors newbie

    bazeboiee

    Joined:
    Apr 23, 2017
    #1
  2. nambuccaheadsau, Apr 23, 2017
    Last edited: Apr 23, 2017

    nambuccaheadsau macrumors 6502a

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #2
    First up is that loud bash two seconds or so from the end part of the noise?

    Sounds very much like a fan. Hard drives usually have more of a clicking noise. Hard drive ever been replaced? If so was a heat sensor kit used?
     
  3. chscag macrumors 68000

    Joined:
    Feb 17, 2008
    Location:
    Fort Worth, Texas
    #3
    It does sound like a fan. Now you have to figure out which one since your 2011 iMac has three fans running. You can probably tell which is the noisy fan by using something like iStat Menus that gives a readout of the RPM for each fan.
     
  4. bazeboiee thread starter macrumors newbie

    bazeboiee

    Joined:
    Apr 23, 2017
    #4
    Ok cool thanks for the update. I think it must be the fan bottom right but I'll double check. Sound is louder over that side and I haven't replaced a thing in it yet except for upgrading the memory.
     
  5. bazeboiee thread starter macrumors newbie

    bazeboiee

    Joined:
    Apr 23, 2017
    #5
    Btw the loud noise at the end isn't part of it, that was me moving around the iMac.
     
  6. kschendel macrumors 6502a

    Joined:
    Dec 9, 2014
    #6
    I've heard hard drives with bearing problems make similar noises, but HDD bearing noise is steady, not wavering like that. I'll agree with it being fan noise.
     

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