Harddrive fan spools to 5k for no reason

Discussion in 'iMac' started by gianthobbit, Jul 6, 2010.

  1. gianthobbit macrumors 6502

    Joined:
    Apr 20, 2010
    #1
    Periodically (maybe once a week) I walk into my computer room to hear the fan spooling at full speed. The iStat widget shows it is between 4-5k RPM. Sometimes restarts fix it (have to do multiple) or I reset the PRAM and that seems to fix it every time. It however happens again randomly...

    I talked to the local apple repair facility and they will take it in and look at it however I will be without my business computer for 3-4 days, which cant happen. Is there anything I can do to resolve this issue or is it purely defective hardware?
     
  2. mlts22 macrumors 6502a

    Joined:
    Oct 28, 2008
    #2
  3. Sun Baked macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #3
    Reset the SMC above, most times that takes care of it.

    ---

    If that doesn't work you can run the Apple Hardware Test.

    http://support.apple.com/kb/ht1509

    Either the drive is overheating, the fan is dusty, or the sensor is starting to go.
     
  4. gianthobbit thread starter macrumors 6502

    Joined:
    Apr 20, 2010
    #4
    I have tried that as well. I think I got resetting pRam and the SMC confused, the steps on that link are the exact ones that I used. If I do a normal restart it sometimes stops the fan from spooling back up that fast, sometimes have to do it multiple times. If I reset the SMC the problem always goes away but then comes back later.
     

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