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My Macbook Pro fans always on

1617 Views 11 Replies Latest reply: Dec 2, 2013 10:34 AM by kalel1977 RSS
kalel1977 Calculating status...
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Nov 28, 2013 11:26 PM

Hi to everyone,

I just noticed some days ago that on my brand new MacBook Pro (5-6 months older) 2.3 ghz I7 with 10.8.5, the right and left fans are always on.


Screen Shot 2013-11-29 at 8.05.19 AM.png


From what I can remember, in this months I never noticed something like this, I mean fans always on, especially when the mac wasn't run any application.

I don't use to install craps on the macs, I always used this philosophy, even if the Mac is less "fancy" and I always got great result, my Powerbook G4 1.67 ghz with 10.5.8 still working great!

I usually use it mainly for music production and daily net-mail works. I have for the 80% of the time the Mac connected with a NEC EX231W external display by thunderbolt, a Motu 4Pre, by the fw800, a WD usb3 hd on a usb port and a 4usb hub on the other port.

From what I can remember in the past months I neved had the fan always on, for most of the time they were really off and from the first moment I always use the set I metioned above.

So now I'm starting to be worry about, because I noticed that even when the mac is working with the battery, with no devices connected, running really few applications, not particualry heavy, the fans are always at 1998/2000 rpm.

Thanks to everyone can help me to fix this problem.

  • mende1 Level 10 Level 10 (89,470 points)
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    Nov 28, 2013 11:28 PM (in response to kalel1977)

    2000 rpm is the default fan speed for the MacBook Pro, so it looks like everything is working OK unless fan sensors are not working.


    If you want, reset the SMC > However, I would not be worried

  • Courcoul Level 6 Level 6 (11,135 points)
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    Nov 29, 2013 12:52 AM (in response to kalel1977)

    Totally normal, they're always on @2000RPM.

  • mende1 Level 10 Level 10 (89,470 points)
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    Nov 29, 2013 11:47 AM (in response to kalel1977)

    The SMC manages the fan speed, so it is the thing to reset if you have any problem with fans.


    On MacBooks, fans always run at 2000 rpm. They will only run at more speed when you are doing heavy tasks, but they won't work below that speed. From what you say, it looks like you didn't notice that fans were working in the past, because fan speed has not changed

  • Shers_74 Calculating status...
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    Nov 29, 2013 12:08 PM (in response to kalel1977)

    Do you have Blackberry desktop software on your Macbook?

  • mende1 Level 10 Level 10 (89,470 points)
    Currently Being Moderated
    Nov 29, 2013 11:31 PM (in response to kalel1977)

    If they were at 0 rpm, that would indicate a problem with the fans. 2000 rpm is the default fan speed and this is normal

  • Courcoul Level 6 Level 6 (11,135 points)
    Currently Being Moderated
    Dec 2, 2013 6:53 AM (in response to kalel1977)

    As we've repeatedly mentioned, the fans are designed to run all the time, in a 2000-6000 RPM range. If at any time speed falls to zero, "Houston, we have a problem" time has arrived. The heat load from the CPU (and GPU, if so equipped) would quickly reach the danger zone.


    Why would you get a zero RPM reading? As usual, it is either a software or a hardware problem. Software: whatever it is you're using for the readout ain't getting it right OR there's a major "kunfuzzion" in there. Hardware: speed sensor(s) damaged OR fan(s) blocked and really not running. Either way, the issue needs to be addressed pronto, cause if "no fan(s)" is really  and truly NO FAN(S), Mac's gonna be kaput in no time.


    Note that I say fan(s) cause we've yet to confirm if yours is a 15" unit. Those and the ancient 17" come with two fans. The 13" units have a single one.


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