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rMBP - fans spin to maximum speed periodically

1854 Views 13 Replies Latest reply: Feb 18, 2013 4:26 PM by jpad1208 RSS
jefferuk Calculating status...
Currently Being Moderated
Dec 31, 2012 5:29 AM

I recently had two 15" rMBP replaced. The first one had white/dull spots on the screen. This was replaced by another rMBP. This second one lasted a little while and then was replaced by another because of ghosting on the display. With regards to this third unit that I have, every now and again for no apparant reason, the fans will spin-up really loudly to what must be full speed, and then spins down again. It sounds like it's about to take off!

 

This never happened with my previous rMBP and I when it happens now, I immediately check the activity monitor, and nothing is happening, and there are no spikes in CPU - there is no load. I'm not even doing anything for the fans to spin up.

 

Any ideas? I've tried to reset the SMC, but I'm not sure that I did it correctly. There's no visual/audible indication after pressing left shift-ctrl-alt-power and then powering on. But anyway, after my SMC reset attempt, half hour later, the fans spun up to life again and then spun down. It's starting to get tiresome. My previous rMBPs were almost always silent unless I'm streaming flash video or something else heavy.

 

I would say this happens once or twice per session that I'm using the laptop. So it's rare, but regular.

MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)
  • OGELTHORPE Level 7 Level 7 (22,505 points)
    Currently Being Moderated
    Dec 31, 2012 5:38 AM (in response to jefferuk)

    Try the SMC reset again.  Perform an Apple Hardware test.  Install a temperature monitor such as iStat pro to see if there are ant temperature spikes.  Opening Activity Monitor is a good idea.

     

    My suspicions are a intermittent temperature sensor or a and intermittent temperature switch.  Intermittent problems are very difficult to diagnose.

     

    A trip to the Genius bar may be in order,

     

    Ciao

  • bames Level 1 Level 1 (0 points)
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    Jan 4, 2013 8:27 AM (in response to jefferuk)

    I have been experiencing the same situation 15" rMBP. Whenever the fans run like this I check iStats Pro which indicates the fans are spinning faster than 5000 rpm and also there is no temperature in the computer over 100F with most temperatures being in the 70s and 80s.

     

    I just completed the SMC reset from apple's website and I did find an indication that the SMC reset worked because the light on the magsafe adapter resets to green and then flips to orange. Although if your battery was full than I guess it would not do anything.

     

    The SMC reset did seem to relieve the problems for now.

  • kirillo Calculating status...
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    Jan 4, 2013 9:34 AM (in response to OGELTHORPE)

    I have a same problem.

    I tried to make SMC reset but problem not resolved.

     

    MacBook Pro retina 15" with Samsung display Mac OS 10.8.2

     

    Sometimes my fans can up to 6k rpm for a few minutes and back to normal after 30-60 seconds. 

    When i run a Games fans are running adequate to a temperature from 2000 to 3500 rpm but sometimes can up 6k

     

     

    In desktop mode temperature not very hot so why my fans can up to 6k ?

  • ComputerFixer Level 3 Level 3 (720 points)
    Currently Being Moderated
    Jan 4, 2013 9:37 AM (in response to OGELTHORPE)

    OGELTHORPE wrote:

     

    Try the SMC reset again.  Perform an Apple Hardware test.  Install a temperature monitor such as iStat pro to see if there are ant temperature spikes.  Opening Activity Monitor is a good idea.

     

    My suspicions are a intermittent temperature sensor or a and intermittent temperature switch.  Intermittent problems are very difficult to diagnose.

     

    A trip to the Genius bar may be in order,

     

    Ciao

     

    At the same time, you could diagnose if it is indeed faulty hardware by using a program such SMCFanControll to set the computers preferred fan speed.   This would force the fan to try to run at, say, 1800 RPM.   If the fan refuses to do so, then you know you are looking at faulty hardware.

     

     

    SMCFanControll: http://www.macupdate.com/app/mac/23049/smcfancontrol

  • kirillo Level 1 Level 1 (0 points)

    Yea, I tried it a several times with SMCFanControll and put to 2000 rpm.

    When i start a game a fans still running with 2000 rpm but in desktop mode on itunes or safari sometimes fans can up to 6000 rpm

  • ComputerFixer Level 3 Level 3 (720 points)
    Currently Being Moderated
    Jan 4, 2013 9:50 AM (in response to kirillo)

    I would definately take that to a Genious Bar.  The fact that you set the fanspeed to 2000 rpm (and the program is reliable, i use it myself) and you are hearing the fan speed up to 6000 rpm, that means there is a problem between the speed controll and the actuall fan motor. As the last poster said, I think you could have a faulty temperature switch, since the temperature sensor is essentually thrown out of the equation by SMCFC.

  • PowderNug Level 1 Level 1 (0 points)
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    Feb 11, 2013 1:42 PM (in response to kirillo)

    And are the fans fixed by the apple store?

  • jpad1208 Level 1 Level 1 (0 points)
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    Feb 17, 2013 9:45 AM (in response to jefferuk)

    Is it still happening to you? Has there been anything new that you have found out?

  • bames Level 1 Level 1 (0 points)
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    Feb 17, 2013 10:07 AM (in response to jpad1208)

    Update

     

    SMC reset ended up only briefly relieving my fan issue. I took my laptop to the apple store yesterday and left it with them. They identified that I had a faulty sensor in the logic board and are replacing the logic board. Hope this helps.

  • PowderNug Level 1 Level 1 (0 points)
    Currently Being Moderated
    Feb 17, 2013 1:27 PM (in response to bames)

    Okay, after about 10 times SMC reset does my rMBP well now.

    Its only spins sometimes above the 5000 RPM when I'm downloading above the 80GB with bittorent or if my rMBP is too hot.

  • jpad1208 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Feb 18, 2013 4:26 PM (in response to PowderNug)

    Has it happened again? Or is it still good?

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