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  1. #1

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    The problem

    I've had my dual g5 for a couple of monthes, and have got used to how noisy the fans are when the processors are oscillating anywher over 35% 45%.

    Over the last couple of days the top fan located behind the cd drive has been starting and cranking non stop at noisy high speeds, and not stoping. This is happening fifteen minutes or so after I switch on the machine.

    Any ideas would be greatly appreciated.

    Cheers sean

  2. #2

    Join Date
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    reset pram.
    boot into open firmware
    and type reset-nvram enter
    then type setdefaults and enter
    i think they are the commands.

    if that doesnt work reinstall the os

  3. #3

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    Th G5s are known for having this problem, and im not sure if the above can help it.

    I think you actually have to take them into get serviced, as there is a fault with the temperature sensors which means they think the CPU is too hot, so the fans run flat out to cool it down, even though the CPU is at a normal temperature.
    1.0Ghz 15" TiBook, MBP 13" 2.4/4/256, MBA 13" 2013 1.7/8/128 SSD, 1st Gen 5GB iPod (mint condition), 2nd Gen 10GB iPod, iPod video, nano and shuffle, iPhone 3GS 32GB, iPhone 5 32GB

  4. #4

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    it may solve it or it may not.
    as Ozi said its a known problem with g5's and apple will look at it and fix it under warrenty.

    is it definatly only the drive bay fan.
    it is always the loudest but id expect all the fans to be faster not just one

  5. #5

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    Yea, its only the drive bay fan. All others appear to be running at normal speeds.
    It just sits at a constant high speed...........weird

  6. #6

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    id reset all those things and re-install the OS.
    those things work for some people but not everyone

  7. #7

    Join Date
    Feb 2004
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    If you have fan problems with your G5, then you need to run the diagnostic disk that tech's have which can re-calibrate the fans. It takes around 30 minutes.
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