imac fan really noisy and fast

Discussion in 'iMac' started by roisin20, Mar 15, 2015.

  1. roisin20 macrumors newbie

    Jul 2, 2008

    I have an imac 2007. I have been living in Ireland where it is quiet cold, I have just moved to Brazil, today it is 30 degrees C. When I turned on my imac the fan was really loud. The computer doesn't even feel hot to touch as I haven't been doing any work on it so far. I installed iStat nano, and the readings were: Temp 44, the hard drive fan was up to 5000,and the highest temp in the list of temps was CPU Diode 57. If this is normal in a hot climate then I can put up with the noise, I just want to make sure that it is ok. I do a lot of graphic work so I hope the computer can stand the heat. I did a test, turned off the computer, turned on air con to 16 degrees for 30 min and when I turned the computer back on it was quiet again. But I'd rather not have to always sit in a cold air conditioned room when i am working, so if it is ok that the fans are whirring super fast then that is ok, I just need to know,

    Thanks! :)
  2. GGJstudios macrumors Westmere


    May 16, 2008
  3. roisin20 thread starter macrumors newbie

    Jul 2, 2008

    Thanks for that, I tried it, it worked for around 5 min but now the fan is on again....
  4. Apple fanboy macrumors Nehalem

    Apple fanboy

    Feb 21, 2012
    Behind the Lens, UK
    Any chance it got damaged in transit? Giving all the air vents a good vacuming when it's powered down can't hurt. With a machine that old, it's probably not worth paying someone to fix it. Make sure you have a back up, as it might be on its way out.
  5. roisin20 thread starter macrumors newbie

    Jul 2, 2008

    Thanks for that, i will give that a go. Yes there is a possibility it may have gotton damaged along the way, thats why I am checking here to see if it is normal for the fans to rotate so quickly and loudly in hot countries or if it has been damaged, thanks for your help
  6. matreya macrumors 65816


    Nov 14, 2009
    My guess is that the temp sensor on your hard drive got dislodged in the move...

    Download smcFanControl and adjust the fans down to 1800 RPM and watch the temps.

    I live in Australia with similar temps and my iMac CPU runs at 49° C.
  7. roisin20 thread starter macrumors newbie

    Jul 2, 2008
    Great thanks so much! I tried that and slowed it down to half the speed so at least its not too noisy any more, :)

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6 March 15, 2015