Left fan spins slower than right fan

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Level 1

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Left fan spins slower than right fan

Hello there..

This morning suddenly I noticed something peculiar. I have this iStat Fan Sensor running in the menu bar and found out that the Left Fan spins at 236rpm and the Right Fan at 5996 - 6005rpms. Perhaps it used to be 2400 or 3000 rpms in avg. most of the time for both fans in an idle state.

I'm beginning to think something is wrong.

Is it normal or something really going wrong? I have my MBP 2010 15" model serviced back in 2011 and they changed my logic board. Never had any issue about this fan issue since then.

So any idea what is going on?

MacBook Pro, OS X Mountain Lion (10.8.2), MBP 17" Core i7 Processor (2.66MHz)

Posted on Oct 24, 2012 6:36 PM

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Answer 1

BGreg

Level 6

17,552 points

Oct 24, 2012 6:56 PM in response to Dematrix

You can always run the Apple Hardware Test, which tests the fans, to see if anything is wrong with the hardware.

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Answer 2

Dematrix Author

Level 1

0 points

Oct 25, 2012 5:14 AM in response to BGreg

Hi again..

After few hours of rest for the computer, I turned it back on it seems to be fine but will update on how it is going later on in the evening.

cheers!!!

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Answer 3

dmdimon

Level 3

856 points

Oct 25, 2012 5:24 AM in response to Dematrix

try to reset SMC

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Answer 4

Dematrix Author

Level 1

0 points

Oct 25, 2012 3:50 PM in response to dmdimon

Just to update....

Well I shutdown my computer and let it rest for 2 hours and then turned it back on this morning and it has been running since this morning and now it seems to be everything ok.

Never did my hardware test nor SMC reset.

So far so good but will wait and see over night and will update.

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