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Released October 24, 2011 / 2.2, 2.4, or 2.5 GHz Quad-core Intel Core i7 Processor

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Fan is running always on at full speed

Hi, i have a late 2011 macbook pro. Few months ago, video card stopped working (i know this model has a thermal problem) So i took it to the service and they replaced the video card. So the macbook started working again, but it was very slow and crashed after a few minutes. So they also replaced the processor. Now the macbook runs perfect, but the fan is always on at full speed (at 6800 rpm!!), since the moment you press the power button. It won´t stop, even if you put the machine to sleep.

I tried:

-resetting SMC

-resetting PRAM

-Programs like TG pro to control fan´s RPM but they do nothing.

None of them worked. All the temperatures in TG pro seems to be normal.

-CPU work is around 2%, it has been formatted recently, so it has no programs installed at all. So there´s nothing stressing the CPU

I ran the Apple Hardware Test, and showed this “4MOT/ 4/ 40000002: Left Side- 7107”

What can I do?

thanks to everyone

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Your fan has failed (left)! Here’s the needed part MacBook Pro 15" (Late 2008-Mid 2012 excluding Mid 2009 2.53 GHz) Left Fan and heres the IFIXIT guide MacBook Pro 15" Unibody Late 2011 Left Fan Replacement

MacBook Pro 15" (Late 2008-Mid 2012 excluding Mid 2009 2.53 GHz) Left Fan Image

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MacBook Pro 15" (Late 2008-Mid 2012 excluding Mid 2009 2.53 GHz) Left Fan

$39.99

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4 Comments:

Thanks, but the fact that I can´t control right or left fan´s RPM with TG pro or other programs makes me think of some sensor issue or something like that, could it be?

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@pablocordero Yes, it's probably a sensing issue, but since there's apparently been quite a bit of work done on that board I'd not hesitate to get the Mac back to the lab where the board was fixed and have them to take care of it as things are quite likely strictly related.

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@pablocordero - The fan unit has a tachometer within it so it knows how fast its moving. The error message is clear: 4MO - MOtor T - Temp

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thanks to all

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pablo cordero will be eternally grateful.
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