Macbook Air - Overheating, Fan issue and battery problems?

Discussion in 'MacBook Air' started by Geoff.D.B, Feb 1, 2014.

  1. Geoff.D.B macrumors newbie

    Feb 1, 2014

    I have a mid 13inch Mid 2012 Macbook Air - i7 version.

    Recently I have noticed the laptop keeps overheating on my lap and the fan is on constantly with even simple things like web browsing. I purchased the i7,8GB ram version and surely web browsing can't be a big task for the laptop. Also the battery life has dropped a crazy amount. I've lost hours on the battery life. The battery capacity has dropped to 86 percent as shown Here in my battery health stats.

    I did a SMC reset and I ran an Apple Hardware test(Extended Version) and it found no problems.

    Any one able to help? There's no Apple stores in my country so I can't just bring it in.
  2. cyber16 macrumors 6502

    Jan 12, 2013
    I doubt this is the problem, yet may as well check.

    Check Activity Monitor to see what Kernel_Task is using for CPU %
    If it is high, as in over 5%-100%+, try a safe mode boot, if it drops back down to .5% - 1.8% or so
    Then you may need to disable BOOM or some other software may be causing the issue. A hardware failure can also cause a high Kernel_Task problem

    Normally high Kernel_Task does not actually create extra cpu heat, it's just throttling the cpu
  3. iCheddar macrumors 6502a


    Apr 30, 2007
    South Dakota
    Honestly, I've seen SMCs not take before. Try doing a reset, start up. Shut down, reset, repeate a couple times.

    You could also just pull the bottom case, disconnect and reseat the battery if you're feeling brave. Also, half the time if I've got a system in the shop with odd power issues that SMC resets aren't resolving, a physical battery pull will resolve it.

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