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  1. #1


    Member Since
    Nov 05, 2011
    Posts
    6
    Arrow ODD fan out of whack - help!
    Hello everybody,

    last week my 2009 20" iMac went from a beautifully silent machine to a noisy vacuum cleaner.

    iStat Pro clocked the ODD fan at 6000 rpm and the HDD fan also at 6000 rpm. This was with an idle machine and just switched on, no heavy apps or time to warm up.

    I tried the SMC reset. No change. Reset the PRAM. No change.

    Looked around in the net, saw that other folks had similar problems with 2009 iMacs and installed ssd fan control. The HD fan went immediately to a more reasonable 1000 rpm. However, the ODD fan stayed at 6000 rpm.

    Does anyone know how to get the ODD fan under control. I think this may be a faulty temperature read... the fan goes full blast immediately after I switch on the iMac, it has not time to get hot.

    Ah, I forgot to day that I live in China and previous experience taught me that taking my machine to the Apple store is a waste of time.

    Thank you for helping.

    Mauri

  2. #2


    Member Since
    Jun 16, 2011
    Posts
    8
    Is this issue still there? i can extend SSD Fan Control in order to control both fans. Let me know if this would help you

  3. #3


    Member Since
    Nov 05, 2011
    Posts
    6
    Yes, this would be great. i have been away for a couple of weeks..., but, yes, the fan is still out of control. Any help would be highly appreciated. Many thanks.
    Mauri

  4. #4

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,720
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    What do you mean 'extend' smcFanControl? Cannot get it to bring down my mac Pro fans. SMC restart is all that helps.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  5. #5

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,030
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    He didn't say "smcFanControl Harry, he's using the "SSD Fan Control app" instead.

  6. #6

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,720
    Specs:
    Imac 27" Retina 3.3GHz, 512GB Flash, 16GB memory, OS X.11.4.
    Mea culpa!
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  7. #7


    Member Since
    Jun 16, 2011
    Posts
    8
    Quote Originally Posted by Exirion View Post
    Is this issue still there? i can extend SSD Fan Control in order to control both fans. Let me know if this would help you
    A new version of SSD Fan Control has been released

    ssdfanctrl

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