Fan making faint clicking noise

[dscuber9000]

I have a 13" MacBook Pro from Mid-2009 and just today I've noticed a real faint clicking noise coming from the fan. It almost sounds like that noise a bike makes when you put a baseball card against its wheel. It's not very loud, but when I'm working in a silent room, it's been pretty annoying. I opened the back and blew all the dust out and all that, but the problem seems to only have gotten worse since then.

Any suggestions to what I should do?

Edit: The fan is still spinning at its usual 2000rpm if that is any help.

 

[mrsir2009]

Try speeding the fan up with SMC fan control and see if the clicking gets louder. That will tell you for sure if it is the fan or not

 

[magamo]

I usually use my MBP in a dead silent room and noticed this sound too. It doesn't always happen. It's not noticeable in a normal situation either. But somehow mine also occasionally makes the something-spinning-keeps-hitting-paper kind of sound too. Usually it fixes itself in a day or two though.