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  1. #1

    Member Since
    Mar 06, 2009
    Fan comes on and stays on
    I have a large imac, aluminium

    The whole thing seemed to be running slow, and seemed hot. I shut it down and on restart a fan came whirring on immediately, as soon as the start up button is pushed. I have tried reinstalling operating system, still the same.

    I have tried smcfancontrol, but it doesn't seem to even register a temperature or fan speed

    I have tried the istats widget thing, and that doesn't register any fans, or at least I can't get it to show anything

    Anyone got ideas on what has happened?

  2. #2

    Member Since
    Aug 21, 2008
    2.66Ghz Penryn C2D iMac
    Did you try resetting the PRAM? Sounds like the controller that monitors all the temp sensors is out to lunch.

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