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My Macbook's fan is very loud. When running SMB Fan Control, it says that my fan is faster than usual. The sound is a grinding noise. It happens constantly (about every 20 minutes) and the only way to stop it is to turn it off, or put it on sleep. How can I fix it?

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up vote 1 down vote accepted

If your fan is making a grinding noise, it's very likely failing.

Send it to Apple for repair.

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1  
make an appointment at the apple store. if they have the fans in stock, they can replace it under warranty in a few hours. – yanokwa Dec 29 '09 at 17:31

I don't know anything about Macs, but a grinding sound from a fan that happens at regular intervals, that is fixed by resting it sounds very much like heat is expanding a support, causing the fan to hit something else.

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