What causes the fan to come on?

Discussion in 'MacBook Air' started by Bakari45, Feb 11, 2011.

  1. Bakari45 macrumors regular

    Jun 17, 2010
    I’m not sure if this question has been asked before, but what causes the fan to come on? Seems like it comes mostly when I’m playing videos, bur right now I’m only running Safari and a few other low level apps. So just wondering.
  2. miles01110 macrumors Core


    Jul 24, 2006
    The Ivory Tower (I'm not coming down)
    More intensive tasks = increased CPU load = increased power draw = increased heat = fans required to cool the CPU.
  3. GGJstudios macrumors Westmere


    May 16, 2008
    To be exact, the fans are always on. It's just that as temps are sustained at a higher level with more intensive demands on the system, the fans spin faster than normal.
  4. torbjoern macrumors 65816


    Jun 9, 2009
    The Black Lodge
    Might be the flash player that hogs your resources. Have you installed ClickToFlash?
  5. Bakari45 thread starter macrumors regular

    Jun 17, 2010
    No I haven’t, but I‘m going to look into it, because the fan is pretty loud right now. Started getting louder when I signed in on emusic.com and sampled some music.
  6. entatlrg macrumors 68040


    Mar 2, 2009
    Waterloo & Georgian Bay, Canada
    The fan on my 13" MBA roars up pretty good the moment I run win7 via VM Fusion ... kinda loud but MBA's aren't optimized to run window's either ...

    Thought about trying coolbook but my opinion is if the fans are spinning up that fast they do so for a reason ... to keep the components within a safe temp.
  7. iRun26.2 macrumors 68000

    Aug 15, 2010
    Safari may seem harmless, but if you are looking at a FLASH based advertisements, you power will go up (and so the fans will turn on)
  8. Penooker macrumors member

    Apr 22, 2010

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