Resolved URGENT! MacBook Air Fan issue

Discussion in 'MacBook Air' started by dilap, Aug 5, 2014.

  1. dilap, Aug 5, 2014
    Last edited: Aug 17, 2014

    dilap macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #1
    I have a MacBook Air 13" Late 2010 2.13GHz, and my fans are extremely loud, sometimes on little CPU usage. SMC resets hardly work and I can't contact Apple without paying the £35.00 for one off support, let alone how much it is for repairs. But lately it's been getting worse, today I started my Mac up and the moment it got to the login screen, the fans went CRAZY. My CPU usage was high at first but after logining in and closing things using Activity Monitor it went down. However the fans still kept going crazy. I had to put my Mac to sleep, and even then the fans kept going for a while. It happens in OS X Mavericks 10.9.4 and OS X Yosemite Developer Preview 5. I don't think a restore will help because it happens on both OS's. I have tried App Tamer as well. My MacBook Air is well ventilated, and I was thinking all Fans are like that on MBA's? Or it's a Late 2010 issue?
     
  2. Hexcruncher macrumors regular

    Joined:
    Aug 5, 2014
    #2
    SMC Reset

    You may need to try an SMC or PRAM/NVRAM reset.

    The SMC is the Macs System Management Controller, and it controls a lot of the core hardware functions such as displaying the correct LED on the MagSafe adapter, The computing waking from sleep when you lift the lid of the mac, and other core functions which includes the fans on the machine. Resetting the SMC could solve this problem

    Instructions from Apple's Support page:

    Resetting the SMC on portables with a battery you should not remove on your own
    Note: Portable computers that have a battery you should not remove on your own include MacBook Pro (Early 2009) and later, all models of MacBook Air, and MacBook (Late 2009).


    1. Shut down the computer.
    2. Plug in the MagSafe power adapter to a power source, connecting to the Mac if it is not already connected.
    3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
    4. Release all the keys and the power button at the same time.
    5. Press the power button to turn on the computer.

    Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.




    If you get stuck there are some great videos of this on YouTube. Best of luck!
     
  3. AppleFanatic10 macrumors 68030

    AppleFanatic10

    Joined:
    Nov 2, 2010
    Location:
    Encino, CA
    #3
    It could be a logic board problem. I had this exact same problem when I first got my MB.. The fans would go crazy when I was doing nothing but they would turn off when I put my MacBook to sleep.
     
  4. dilap thread starter macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #4
    As I said I tried the SMC Reset, but how do u reset the PRAM?

    ----------

    Thanks, will I have to replace the logic board? How did u fix it?
     
  5. AppleFanatic10 macrumors 68030

    AppleFanatic10

    Joined:
    Nov 2, 2010
    Location:
    Encino, CA
    #5
    Fortunately for me, I still had 1 month of AppleCare left, so Apple replaced the logic board for me for free.
     
  6. iPhysicist macrumors 6502a

    iPhysicist

    Joined:
    Nov 9, 2009
    Location:
    Dresden
    #6
    The Question is: Does it get hot and the fan is just responding to the usage? Or does the fan go crazy without reason? If its the latter. Set it up as new. If that is not the case, do you feel the airflow form the fan? No? Then maybe you have to much dust collected inside the fan. You should just detach the bottom of your MBA and use a vacuum to clean the fan. This often is enough but if its none of the above you maybe have a defective motherboard as already mentioned.
     
  7. dilap thread starter macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #7
    I just cleaned the fan. The case didn't come off fully as I had a stripped screw(the MBA's preowned) and I managed to get a vacuum in. I'll update if it worked or not.
     
  8. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #8
    How did you vacuum it if you didn't get the cause off?
     
  9. dilap thread starter macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #9
    It was only one screw so when I tried to take it off it lifted off about 2-4 inches, luckily the fan was on the opposite side of the striped screw so I was able to access it easily.

    ----------

    It appears to be fixed, thank you all! iPhysicist, your soloution was perfect. Thanks iAppleFanboy, if the issue comes back, I will look for your solution, its still under warranty with the eBay seller so they will do it.



    :apple::):apple::):apple::):apple::):apple::):apple::):apple::):apple::):apple::):apple::)
     
  10. iPhysicist macrumors 6502a

    iPhysicist

    Joined:
    Nov 9, 2009
    Location:
    Dresden
    #10
    Im happy that your problem is fixed. Enjoy your MBA.
     
  11. Newtons Apple Suspended

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #11
    Dust or dirt on fan does not usually make the fan go to high RPM when it first starts up and only does this after heating or over heating.

    No matter, glad it works.
     
  12. dilap thread starter macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #12
    Thanks. It was probably just Yosemite and some app doing something, maybe it was overheating, it was quite hot to touch the black bar above the keyboard. I left it for ages, it had really infuriated me and I didn't want to use it! Airmail still makes my fans go bad but it uses a lot of cpu.
     
  13. iolinux333 macrumors 68000

    Joined:
    Feb 9, 2014
    #13
    Note the mid-2011 MBAs did this because of a bug introduced in Mavericks and the issue was only resolved two weeks ago with a software update. I don't know, and doubt this is/was your issue, but it's something to keep in mind.
     
  14. russellj macrumors newbie

    Joined:
    Feb 19, 2015
    #14
    Just to add my 2 cents: My 13" Macbook Air Late 2010 had a very similar problem:

    Kernal CPU usage over 100%
    Constant freezing, beach ball, etc.
    Fan at constantly high speed from startup
    Updates, PRAM reset, SMC reset, etc, non-helpful
    Dispair.

    The problem ended up being a problem with the connector that goes over the fan (easily viewable if the bottom is removed). It had evidently jostled loose by way of a drop or two.

    Also had some wine spilled on it a few months before.

    Cleaned (isopropyl alcohol, Q-tip) and reinstalled that connector and the issue disappeared.

    https://d3nevzfk7ii3be.cloudfront.net/igi/kpxaSggiRGXdYbjE.huge
     
  15. dilap thread starter macrumors 6502a

    Joined:
    Apr 18, 2014
    Location:
    London, UK
    #15
    Thanks! I will look into this. The fan and vacuum actually didn't help, but I used MacFanControl and it runs at a constant 2300 rpm, unless it is getting slow and laggy, in which case I let it cool of.
     

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