imac fan spinning all the time really fast

Discussion in 'iMac' started by brett2032, Jul 26, 2013.

  1. brett2032 macrumors newbie

    Jul 19, 2012
    I have a late 2012 21.5 iMac. I have istat menus 4 and it is telling me that my fan is spinning between 2500 and 2800 rpm witch I can hear. It is spinning this loud all the time never slowing down. I have uninstalled and reinstalled. I ran apple hardware test and got a 4mot /4/ 40000003: main-2730 error.
  2. LostSoul80 macrumors 68020


    Jan 25, 2009
    What are the reported temperatures?
    Also, 2500-2800 r.p.m. is a fairly low speed for fans.

    You may want to open up Activity Monitor, and check if there are programs running perhaps in the background using your CPU.
    Have you installed anything "strange" lately?
  3. LPZ macrumors 65816

    Jul 11, 2006
    I'd take it to an Apple Store, based on the failed hardware test (and the fact that it's not a year old).
  4. brett2032 thread starter macrumors newbie

    Jul 19, 2012
    I restated my iMac again and the fan was back to normal the temps were around 106 F when it was spinning that fast the normal rpm is 1400. I have not installed anything lately but I have a antivirus program from the mac app store so I run it and see if it finds anything. If it start going crazy again I will just take it back to the apple store.
  5. Serban Suspended

    Jan 8, 2013
    i got some around 1800 rpm when i play some starcraft 2, and meanwhile im using for the first time time machine ,so backing up wireless (i suppose this count too increase the rpm of the fan). And yes from 1800rpm i hear the fan too

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