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Thread: Fans always on

  1. #1
    Fans always on

    Member Since
    Jan 17, 2009
    Posts
    9
    Fans always on
    Hi all,

    Just after getting fed up with my mac book pro because it was over heating at 70C and takes almost buns my lap off.

    Have tried:
    smcfan
    Fan Control
    CoolBookController

    All where showing that fans where at 4000rpm and 60-70C cup and gpu.

    So opened up mac and cleaned up cpu, gpu and put some thermal paste on it closed back up and put everything together.

    Now temperature is running at 30-45C

    BUT fans are running at 6000rpm and both are running, any ideas what can do or what component might have damaged or not plugged back in properly? Also something to note that i had just upgraded to Snow Leopard 1 week ago.

    Also when i did Apple Hardware Test (AHT) comes back with 4SNS/1/40000000: TG0H-128.000, but can not get much from that. Same story in safe mode, deleted all bits of software could do.

    Thanks

  2. #2
    Fans always on

    Member Since
    Feb 26, 2008
    Posts
    4
    Seems that we are on the same boat!

  3. #3
    Fans always on

    Member Since
    Jan 17, 2009
    Posts
    9
    How long as yours been like this, been checking up on MacBook Pro 15" 2.2ghz - Fans always on - iFixit to see see if can get replacement parts.

    Also found this not sure if its related since I just upgraded to Lepord List week buts its only after opened machine that fans where constant, before they where just on and off as temperature went up and down.

  4. #4
    Fans always on
    vansmith's Avatar
    Member Since
    Oct 19, 2008
    Location
    Toronto
    Posts
    19,398
    Specs:
    2012 13" MBP (2.5 i5, 8GB)
    It may have nothing to do with dysfunctional parts. Are the fans clogged with dust by any chance?

    What kinds of surfaces are you using your MBP on? Avoid soft surfaces like your lap or a bed and stick to hard flat surfaces like a desk. Soft surface restrict air flow which increases temperature and thus, it increases fan speed.
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  5. #5
    Fans always on
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    31,499
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.7.5
    It may also have something to do with what you're doing with the laptop.

    If you are gaming quite a bit...or watching lots of internet videos or You-tube...this will make your laptop run much hotter than if you were just doing e-mail, or "regular" internet surfing.

    - Nick
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  6. #6
    Fans always on

    Member Since
    Jan 17, 2009
    Posts
    9
    Quote Originally Posted by vansmith View Post
    It may have nothing to do with dysfunctional parts. Are the fans clogged with dust by any chance?

    What kinds of surfaces are you using your MBP on? Avoid soft surfaces like your lap or a bed and stick to hard flat surfaces like a desk. Soft surface restrict air flow which increases temperature and thus, it increases fan speed.
    No dust in machines. Have it on glass table and as said the machine is not running hot at all its at present 33C.

    Quote Originally Posted by pigoo3 View Post
    It may also have something to do with what you're doing with the laptop.

    If you are gaming quite a bit...or watching lots of internet videos or You-tube...this will make your laptop run much hotter than if you were just doing e-mail, or "regular" internet surfing.

    - Nick
    Not doing anything except on internet and its even running a lot even without having anything open.

  7. #7
    Fans always on

    Member Since
    Jan 17, 2009
    Posts
    9
    WWOOOO thank you for all your help, working again just temperature sensor in middle that popped out.

  8. #8
    Fans always on
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,284
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    Quote Originally Posted by namit View Post
    WWOOOO thank you for all your help, working again just temperature sensor in middle that popped out.
    Sometimes it's the simple things that are overlooked. Glad you got it working.

    Regards.

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