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Mac mini fan always running

7978 Views 6 Replies Latest reply: Apr 16, 2007 9:41 AM by Governa RSS
Governa Level 2 Level 2 (200 points)
Currently Being Moderated
Apr 16, 2007 8:02 AM
My Mac Mini Intel Core Duo 1.66 just came from a RAM upgrade in an Apple dealer. The strangest thing is that the fan runs continuously, something it wouldn't do before, it has always worked in absolute silence.

Now, as soon as I press the power button, the fan comes at max speed. Why is that?

The CPU temperature has never been so low (32c max) but the fan still keeps blowing at max speed.

I've tried reseting the SMC but 1- it doesn't appear to work and 2- I can't really tell if it did reset the SMC...

Any suggestions? Do you think they might have messed up with something (temp/fan sensor)? I can feel a LOT of air coming out of the Mac mini so I don't think it is related to high cpu temperature or some plastic avoiding the air getting throwgh.

Sorry my poor english.
Mac Mini CoreDuo 1.66 + iBook G4 12" 1.33 + iMac G3 233 + Macintosh LC 12" 16MHz, ... and an iPod Nano 4GB white
  • AndyO Level 6 Level 6 (17,045 points)
    Currently Being Moderated
    Apr 16, 2007 8:13 AM (in response to Governa)
    The most common problem of this sort is that when the RAM upgrade is done, the little fan control cable is not reconnected properly. Without that cable, the fan is set to default to run all the time at full speed.

    I would return the unit to the dealer who did the upgrade and ask them to check and reconnect the cable if it is disconnected. It should take barely 5 minutes.
    G5 DP/2.0, Mini/1.25, Mini/1.50, G4/450, TiBook/800, iBook G4/800, Mac OS X (10.4.9)
  • Bozz_2006 Level 3 Level 3 (505 points)
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    Apr 16, 2007 9:03 AM (in response to AndyO)
    it's re-*******-diculous that this problem is as prevalent as it is. how can such an oversight happen so many times?
    Mac Mini 1.66ghz Core Duo 2GB RAM, Mac OS X (10.4.9), i have an ipod too
  • AndyO Level 6 Level 6 (17,045 points)
    Currently Being Moderated
    Apr 16, 2007 9:20 AM (in response to Bozz_2006)
    I would question the proposition that it is a prevalent issue, simply because we have no quantifiable evidence to show what proportion of systems suffer from it, either subsequent to service or even without being opened. We see a number of reports of it here, for sure, but that's not a reliable guide as to how commonly it happens in general.

    It might be that the cable would better be colored more brightly such that it is less easy to overlook it, but I suspect it's purely carelessness - particularly when service was undertaken by an Apple approved service provider, who should certainly know better.
    G5 DP/2.0, Mini/1.25, Mini/1.50, G4/450, TiBook/800, iBook G4/800, Mac OS X (10.4.9)
  • AndyO Level 6 Level 6 (17,045 points)
    Currently Being Moderated
    Apr 16, 2007 9:32 AM (in response to Governa)
    Thanks for posting back to let us all know!
    G5 DP/2.0, Mini/1.25, Mini/1.50, G4/450, TiBook/800, iBook G4/800, Mac OS X (10.4.9)

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