Computer fan doesn't stop

Discussion in 'Mac Pro' started by refugeeman, Nov 1, 2011.

  1. refugeeman macrumors newbie

    Joined:
    Nov 1, 2011
    #1
    I have a Mac Pro Dual-Core Intel Xeon running Snow Leopard. The fan now comes on and is loud and continuous. I've tried re-starting and shutting down overnight but it won't cut off. Never had this problem before and I usually don't shut down my computer. Has anyone had this problem or any ideas how to fix this problem.
     
  2. Gav2k macrumors G3

    Gav2k

    Joined:
    Jul 24, 2009
    #3
    Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

    Also have u cleaned the heatsink's at all??
     
  3. refugeeman thread starter macrumors newbie

    Joined:
    Nov 1, 2011
    #4
    simsaladimbamba success

    simsaladimbamba,
    I just tried resetting the SMC and BINGO! it worked right away.
    Many thanks for your suggestion.
     
  4. pbanas macrumors newbie

    Joined:
    Sep 15, 2006
    #5
    Gotta love MacRumors helpers

    SMC reset worked like a charm. I'd been listening to the fan for a month and turning the music higher and higher!
     
  5. pbanas macrumors newbie

    Joined:
    Sep 15, 2006
    #6
    Solution worked for 20 minutes - back to fan!

    Alas. What now?
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Launch Activity Monitor and change "My Processes" at the top to "All Processes", then click on the CPU column heading once or twice, so the arrow points downward (highest values on top). Also, click on the System Memory tab at the bottom. Then take a screen shot, scroll down to see the rest of the list, take another screen shot and post them.
     
  7. atlanticza macrumors 6502a

    atlanticza

    Joined:
    Jul 18, 2008
    Location:
    Cape Town
    #8
    Mac Pro fans run continuously.

    I have a similar problem... even from a stone cold start. Fans start on grey screen startup. Reset SMC, PRAM etc. All updates up to date. No unusual activity in Activity Monitor. Any help much appreciated!
     
  8. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    Install iStat Pro to get accurate readings of your temps and fan speeds. Then follow the instructions in my last post, including posting a shot of iStat Pro.
     
  9. atlanticza macrumors 6502a

    atlanticza

    Joined:
    Jul 18, 2008
    Location:
    Cape Town
    #10
    Here you go...

    Thanks for the help
     

    Attached Files:

  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #11
    I don't recall what minimum speeds are for the Mac Pro, but your fan speeds don't appear to be extremely high. There's nothing in Activity Monitor that points to any high demands on your system, but your temps look a bit off to me. I'd try resetting the SMC again. NVRAM/PRAM has nothing to do with these issues, so resetting that won't help.
     
  11. wonderspark macrumors 68030

    wonderspark

    Joined:
    Feb 4, 2010
    Location:
    Oregon
    #12
    My Mac Pro is basically at idle at the moment, with fan sensors reading:
    Booster Fan CPU A: 798
    Exhaust Fan: 510
    Fan Expansion Slots: 1511
    Intake Fan: 510
    Power Supply Fan: 940

    I also have the Fan Control app running, with fan speeds cranked down to the minimums until temps breach 111 degrees F. Hope that helps.
     
  12. atlanticza macrumors 6502a

    atlanticza

    Joined:
    Jul 18, 2008
    Location:
    Cape Town
    #13
    I tried that a number of times but to no avail. Thanks for your interest!
     

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