Fans randomly turn on at full speed during sleep

Discussion in 'MacBook Pro' started by Wilson1313, May 25, 2017.

  1. Wilson1313 macrumors member

    Nov 29, 2008
    I have a Macbook Pro Retina 13" (Early 2015) running El Capitan. Not sure if it was an update recently or not, but about a week ago the fans randomly start running full blast when the computer is asleep. This occurs nearly every day now, mostly when the computer is asleep in the middle of the night (I have been shutting my computer down to prevent this).

    I tried the SMC reset procedure a few times but this hasn't done the trick (unless I am not resetting it properly).

    Are there any other techniques to reset the SMC or any other advice?
  2. ryguy92000 macrumors regular


    Sep 20, 2014
    Salt Lake City, UT
    Try an SMC reset combined with a PRAM reset. If those still don't work hold D on boot up for the diagnostic screen, follow the prompts and let us know what comes out if anything.
  3. Fishrrman macrumors P6


    Feb 20, 2009
    Unless there is a reason that is terribly important to keep running the MacBook at night, why not just shut it down and be done with it?

    Bootup these days takes only a few seconds...
  4. jgarthwaite77 macrumors newbie

    Mar 19, 2015
    Mine does this, it's a 2009, it looks like it's the automatic updates, I have them set to run at night when the MacBook is asleep. I can hear the fans stir up and in the morning I get a notification the update is complete.
  5. MC6800 macrumors 6502

    Jun 29, 2016
    Console will tell you what was going on at the time-- the reason should still be in your logs. Choose "All Messages", enter "wake" in the search box, and then hit the "Earlier" button below the log to go back days.
  6. Wilson1313 thread starter macrumors member

    Nov 29, 2008
    Updated to Sierra finally and seems to be fixed.
  7. Wilson1313 thread starter macrumors member

    Nov 29, 2008
    After about a month, started having this issue again with fans randomly turning on full blast in the middle of the night while the computer is asleep. Tried resetting SMC again. Any other suggestions? Going to Apple Store or clean install Sierra??
  8. MC6800 macrumors 6502

    Jun 29, 2016
    What did Console say was happening at that time?

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