Is it possible to MAKE my fans turn on?

Discussion in 'Mac Basics and Help' started by jive, Jul 28, 2006.

  1. jive macrumors 6502a

    Joined:
    Apr 14, 2006
    Location:
    Scotland
    #1
    I have a Rev A 17" Intel iMac and it's hot to the touch. I'm thinking that it can't be good for it so is there anyway to force the fans to come on when I want? Or should I not worry about it?
     
  2. yellow Moderator emeritus

    yellow

    Joined:
    Oct 21, 2003
    Location:
    Portland, OR
    #2
    I don't think one can force the fans on. They'll come on when it hits a certain temp, I wouldn't worry about it unless they NEVER come on.
     
  3. jive thread starter macrumors 6502a

    Joined:
    Apr 14, 2006
    Location:
    Scotland
    #3
    iMacs don't have temp gauges as far as I'm aware. And I've never heard them come on apart from that update a few months back...
     
  4. yellow Moderator emeritus

    yellow

    Joined:
    Oct 21, 2003
    Location:
    Portland, OR
    #4
    It has to have some sort of temp gauge, perhaps it's just not accessible from the OS (meaning it's part of/controlled by the EFI).
     
  5. Makosuke macrumors 603

    Joined:
    Aug 15, 2001
    Location:
    The Cool Part of CA, USA
    #5
    Oh, there's a temp sensor in there somewhere. The Core Duo just runs cool enough relative to the early G5s that you don't hear the fans much.

    Finding the sensor and cutting the wire (or leaving it disconnected) would of course force the fans on full blast, but that's not a useful soltion and there is nothing in software that I know of.

    Really, it's almost certainly fine--it just runs warm, as pretty much every computer does (heck my ACD gets VERY toasty, and it doesn't even have a fan--sure it's not just the screen getting warm?).

    But here's something you can try if you're freaking out about it: On the Intel Minis there is a way to trick the fans into running full blast all the time. If you disconnect the power (and everything else) from the computer, then hold down the power button while plugging the power back in, when you hook everything else up and boot the fans will be stuck on full blast.

    This MIGHT work on an Intel iMac, too, though I haven't tried it. It shouldn't hurt anything--you're just confusing the firmware control of the fans--but it's very noisy.
     
  6. Doctor Q Administrator

    Doctor Q

    Staff Member

    Joined:
    Sep 19, 2002
    Location:
    Los Angeles
    #6
    I apologize in advance for this...

    Timothy Leary's fans turned on all the time!

    ...I apologize in retrospect too.
     

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