Why is my fan so loud?

Discussion in 'MacBook Air' started by still in school, Dec 9, 2009.

  1. macrumors 6502

    Feb 21, 2009
    Lately I've been noticing that my MBA rev A sounds like a helicopter taking off! Temp is around 59 and all I'm doing is surfing. Fans would rev up to 6000rpm! I'm at the library trying to study and this is embarrassing. Has anyone have a similar problem? What did the genius bar say?
  2. Nak
    macrumors newbie

    Feb 4, 2008
    Portland, OR
    "still in school",

    Take a look at my post in:


    Note that you should be using CoolBook if you do this since you need a program to properly throttle the CPU clock when it gets too hot. CoolBook also allows you to set a temp limit (mine's set to the max - 85C).

    With the fan limited to 5000rpm, it's barely audible in my office. It's probably going to be more audible in a library, but will be tons better than 6200rpm.

  3. macrumors newbie


    Nov 27, 2009
    My A is silent even if at 6200 when playing COD4

    install all patches from apple , and use smcfancontrol to limit the speed of the fan. http://forums.macrumors.com/showthread.php?t=830676

    Rememeber the fan also tries to cool several components of the logic board so if the CPU is cool (as per coolbook) maybe other chips are hot and the fan tries to keep them cool.

    the helicopter sound maybe a "service me" call.

  4. macrumors 601


    Dec 5, 2007
    Yay Area, CA
    The fan at 6200RPM is audible but it shouldn't be a helicopter. I let my fans run at 6200RPM and its still quieter than my other classmates' HP laptops

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