Fan is always running on 2011 Air. Annoying.

Discussion in 'MacBook Air' started by Tenashus1, Jun 20, 2015.

  1. Tenashus1 macrumors 6502

    Joined:
    Jul 27, 2011
    #1
    Anything to be done to slow down the fan on my 2011 Air? It constantly runs with only a web browser working. 90% idle and still it runs.
     
  2. motrek macrumors 68020

    Joined:
    Sep 14, 2012
    #2
    I've seen a number of people complain about this after liquid spills. I think maybe a sensor stopped working? Hopefully somebody else can chime in with more information or maybe this will give you some more words to search on.
     
  3. Tenashus1 thread starter macrumors 6502

    Joined:
    Jul 27, 2011
  4. BrettApple macrumors 65816

    BrettApple

    Joined:
    Apr 3, 2010
    Location:
    Heart of the midwest
    #4
    Umm. The fan on all MacBooks (minus the new 2015 one) will always be running. If it isn't, the MacBook is either off or the fan is dead. This is usually around 2,000 RPM or so depending on the model and it should be rather quiet. If it's running on high (5000+ RPM) it will get quite loud and it shouldn't be doing that unless it's running hot. Does it feel hot on the bottom or near the hinge? If so, something is making it run warm. Such as dust in the fan and heatsink.

    If not, it could be something software related or a sensor as mentioned. You might try installing a second copy of OS X on another partition or external drive and booting off of that to see if it still does it. If it doesn't than it's software, if it does you've got something else going on.
     
  5. Tenashus1 thread starter macrumors 6502

    Joined:
    Jul 27, 2011
  6. soupcan macrumors 6502a

    soupcan

    Joined:
    Nov 21, 2014
    Location:
    Netherlands
    #6
    Do something which Apple doesn't want you to do: open up the bottom plate and clear the dust out of the system with an air duster. There's probably a LOT of dust in the vent system that's preventing the Mac from cooling properly. I did it once, lost me 20 degrees Celsius off of the idle temps.

    If you wanna know how to do that, Google it. There are plenty of articles/videos on how to open up a Mac and how to keep PCs in general dust free.
     
  7. motrek macrumors 68020

    Joined:
    Sep 14, 2012
    #7
    Is it charging? Do you have USB devices plugged in that would draw a significant amount of power, e.g., external hard drives or optical drives?

    You can download a program called smcFanControl to see exactly how fast the fan is running and what your system temperature is. That would give some good diagnostic data.
     
  8. Mrbobb macrumors 601

    Joined:
    Aug 27, 2012
    #8
    The fan always runs but should idle ~2,000 RPM which on my machine is inaudible. Perhaps you need to bring it in.
     
  9. halledise macrumors 65816

    Joined:
    May 7, 2009
    Location:
    Hamilton Island, Whitsundays, QLD Australia
    #9
    try an SMC reset - https://goo.gl/cVJ2cF
     
  10. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009

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