First off, a noisy fan isn't always external dust. It has a motor with a shaft and bearings or bushings. These wear and clearances increase causing the shaft to sort of bounce around rather than run smoothly. You may not be able to do much about the noise without replacing the fan. I've been able to lubricate a few but the quieting is temporary. As for dust, I'll recommend canned air and a small paint brush. You're going to need to also clean the dust from the heat sink. They come in all shapes and sizes so I'll just say to blow away as much dust as you can with the air and then go at it with the paint brush getting into all the nooks and crannys that are reachable. Follow up with another blast of air. I've heard it wise to unplug the fan from the motherboard first. The reasoning is that spinning the fan might cause enough current to be generated to damage circuitry. While you're at it, use the canned air to remove dust from the inside of the power supply as well. You might want to go so far as to do this outdoors so the same dust doesn't have a chance to come right back inside. There's plenty of new dust around anyway. Hope that helps.
Friends, I have this 4 year old intel fan which is making a lot of disturbing noise. Thats
probably because of the dust accumulated in it since long time. I usually just dust it
lightly with a brush from the top sometimes but that doesn't help the noise at all. Can
someone explain me how to remove my CPU fan so as to clean it without causing any major
problems like processor getting burned etc. Do you think it can be done safely by a PC
newbie like me once every six months.
My CPU Fan is square in shape with side long white flaps on two sides which can be flipped
up. There are no noticable screws anywhere on the fan. I have tried to search for pictures
similar to my fan model on google but couldn't find any.
Further I had once tried removing the CPU Fan myself. Here is how.. Slowly flipped up the
two white flaps and felt the fan relax a little. Then holding the fan on either side just
below the flaps, tried pulling it up with little more than gentle force. The fan just
wouldn't come off..!! I dared not put any more force in case I was pulling at the wrong
thing. Then just quietly put the flaps back in place and haven't tried since. Should I
try once more guys..