REALLY noisy fan on 24" iMac

Hi. I got my iMac 24" September 2008. This year, or maybe late 2009, the fan started making small noises. Now, a week ago maybe, the fan is like a vacuum cleaner! I start my Mac, a minute or two later the fan is loud. I can hear that its going louder and louder when i turn it on. I've tried to reset the Systems Management Controller (SMC), turn it off and keep the power cable out for half an hour - hour.
I really hope someone can help me!

This design of Mac can get really dirty or dusty inside. You may need to have a tech clean it out for you if it is not too late for the bearing on that fan.
They replaced the display in my 17" Core Duo last summer and I was shocked at how much dust had gummed it up inside. The tech threw in a free cleaning. And I have a very clean home!
Dah•veed

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    Noisy fans in iMac 24
    Posted: Aug 2, 2008 1:47 AM
    Reply Email
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    Your English is many times better than my Portuguese! You are doing very well.

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    I got DV6t  core i5  6gb ram + 1gb Ati Radeon Graphic Card (6490m) + bluetooth + Bluray 
    I have to return it because of that noisy fan ; i was a new member of Hp family and i never investigate about that product for Laptop. After it got that gorgeous Laptop , i got this fan issue ; and i research that fan is working normal/anormal ; what i find out is Hp has a Noisy Fan Issue on all of the Video clips , Forum Websites even its own website ; I realy didnt know till i got it. If that is a common issue , Why that big brand HP doesnt solve that problem since many years ? I sincerely doesnt want to return this item because of fan ; because there is no comparative product in others company has .... (Bluetooth + Bluray + Finger print + 1gb (Integrated Graphic) and $749 ; i can not find any brand or product which includes that options in this price ..... So UNFORTUNATELY i am returning that Beautiful Laptop Because of ridiculous fan noise ; is that really hard to install a fan which is really silence ??? I have a Toshiba brand laptop , even the fan is working  hard there is no bothering noise at all (Even its 4 years old) . I was thinking that Hp product has high performance equipment thats why this fan works hard or noisy because it could be stronger than my Toshiba which has core 2 duo technology 256 mb graphic card ; But i was wrong because of this video clip ; http://www.youtube.com/watch?v=-yLEXZGRGPY

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