Fan speeds not detected

Discussion in 'MacBook' started by FreddyT, Feb 3, 2010.

  1. FreddyT macrumors newbie

    Joined:
    Feb 3, 2010
    #1
    Using both smcFanControl and istat, I cannot get a reading on my fan speeds. I can hear my exhaust fan spinning, but these programs tell me it is always at 000 rpm. Also, I don't think the fan control is working, as I don't hear an increase in fan speed when I make adjustments.

    Does anyone know how I can get these apps to recognize my exhaust fan? Thanks
     
  2. iLog.Genius macrumors 601

    iLog.Genius

    Joined:
    Feb 24, 2009
    Location:
    Toronto, Ontario
    #2
    Remove both smcFanControl and iStat properly, reset the SMC and then reinstall both again and see what happens.
     
  3. jenny28583 macrumors newbie

    Joined:
    Feb 1, 2010
    #3
    Yep, that's what I'd do. Are you absolutely sure you can hear the fan and not something else? The hard drive can make a very faint noise too.
    Maybe your fan is fried?
     
  4. FreddyT thread starter macrumors newbie

    Joined:
    Feb 3, 2010
    #4
    Thank you for your comments.

    I trashed those apps and reset my SMC by taking out the battery and holding the power button for 5 seconds. However, after reinstalling smcFanControl, it still couldn't get any fan readings.

    I suppose its possible the humming I'm hearing is actually coming from my hard drive, but I read that the fan is just about under the '7' button, and this does seem to be the center of the slight sound/vibration.

    Is there any other way for me to check to see if the fan is working short of taking it apart?
     
  5. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #5
    Start running 720p YouTube videos. That'll get the CPU temp up pretty quickly and in turn should cause the fan to ramp up after a bit of time. If you have a Unibody Aluminum model, it'll take a little longer.
     
  6. jenny28583 macrumors newbie

    Joined:
    Feb 1, 2010
    #6
    Yeah, stream a few videos in parallel - sure fire to heat up the CPU. If the fan works, vou WILL hear it. If it doesn't your computer will eventually shut down to avoid overheating...not sure at which T though - around a 100˚C, I'd guess.

    Could well be, that your fan is fried - wouldn't be the first one.
     

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