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  1. #1
    Fan runs all the time ... except when it is hot

    Member Since
    Jan 30, 2009
    Posts
    4
    Fan runs all the time ... except when it is hot
    So, my fan runs almost all of the time. It is usually above 6000 rpm. The exception? When it is hot. Then it runs around 2000 rpm.

    Any ideas? It has been this way as long as I can remember, I just haven't ever done anything about it.

    You would think the thresholds would be flipped....

  2. #2
    Fan runs all the time ... except when it is hot
    ADKhikerVW's Avatar
    Member Since
    Aug 18, 2007
    Location
    Wilmington, NY
    Posts
    715
    Specs:
    15" Unibody MBP (2009), White MB (2009), iMac G4
    No idea why they would be flipped like that, but have you checked Activity Monitor to see if there are any processes that are eating up your CPU?

  3. #3
    Fan runs all the time ... except when it is hot

    Member Since
    Jan 30, 2009
    Posts
    4
    Quiet (Sometimes)


    Loud (Most of the time)

  4. #4
    Fan runs all the time ... except when it is hot
    ADKhikerVW's Avatar
    Member Since
    Aug 18, 2007
    Location
    Wilmington, NY
    Posts
    715
    Specs:
    15" Unibody MBP (2009), White MB (2009), iMac G4
    Thats wierd, since it is only the left fan which is going nuts. Did you try resetting your SMC and PRAM?

  5. #5
    Fan runs all the time ... except when it is hot

    Member Since
    Jan 30, 2009
    Posts
    4
    Just reset both - no change

  6. #6
    Fan runs all the time ... except when it is hot
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,190
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    Quote Originally Posted by fooderater View Post
    Just reset both - no change
    You've got a defective fan and\or possibly a thermal sensor which is not working right. Either way, it's probably best to let the genius bar at Apple take a look at it. Is you machine still under warranty?

    Regards.

  7. #7
    Fan runs all the time ... except when it is hot

    Member Since
    Jan 30, 2009
    Posts
    4
    That equates to them sending my machine away right?
    It is still under warranty....

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