new imac fan will not turn off

Discussion in 'Mac Basics and Help' started by wizzerandchips, Mar 9, 2009.

  1. wizzerandchips macrumors 6502

    Jul 6, 2006
    have a new 24" imac, about a year old and the fan came on after it got very hot, only browsing the web) and now it wont turn off!, switched off mac last night, turned it on again this morning and fan is spinning like a goodun. :confused:
  2. BlueRevolution macrumors 603


    Jul 26, 2004
    Montreal, QC
    Sounds like your temperature sensor may be acting up. I'd take it in to the shop.
  3. xodus macrumors newbie

    Aug 22, 2006
    Toronto, Canada
    There might just be a process that is hogging your CPU.

    Open /Applications/Utilites/Activity Monitor

    Change from "My Processes" to "All Processes"

    Sort by CPU (Decending) and see if any process is over 80%. If so, quit it. Or force quit.



    type in "top" (no quotations) and hit enter

    If any process is taking a serious % of your CPU then type

    killall <nameofproccess>

    e.g.: killall Firefox

    Another tip is download iStats Pro:

    This will tell you exactly what part of your machine is the hottest.

    Good luck!
  4. wizzerandchips thread starter macrumors 6502

    Jul 6, 2006
    thanks, have got istat and clicked on fans and is blank, so must be a problem, done all what you have said and nothing is over 6%, so its a trip to apple.
  5. champagnetaste macrumors newbie

    Nov 28, 2009
    Your advise worked for my Mac

    Thanks for the advise. I followed it to the letter. My Mac is sweet and silent now. Whew!
  6. DoFoT9 macrumors P6


    Jun 11, 2007
    it does sound pretty bad for you, sounds like the fan might be dead (or the heat sensors or something related). get that checked out asap

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