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Laptop fan running loudly


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#1 TaylorWilliams

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Posted 20 October 2011 - 04:34 PM

My laptop's fan has been running very loudly the last few days. Even the simplest tasks makes the fan go crazy.

I've already tried dusting the inside of the laptop fan and around it with canned air and it hasn't helped at all.

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#2 rotor123

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Posted 20 October 2011 - 05:03 PM

Simple test to run to help pin down the problem.
The fan running fast means overheating...........

Find where the air is exhausted from the computer and see if it blowing strong.
See if it is blowing hot air in volume or cool air.

only a little air would indicate that the heat sink is plugged with dust.
Cool air would indicate that the HeatPipe that transfer the heat from the cpu to the heatsink is bad.
Or that the mounts for the heatsink to the motherboard have broken. I've seen it on certain model Dells.

Some details on what is coming out of the fan outlet would help.

Also if you can see the heatsink fins are they hot or cold?

Edited by rotor123, 20 October 2011 - 05:04 PM.

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#3 TaylorWilliams

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Posted 20 October 2011 - 05:16 PM

Simple test to run to help pin down the problem.
The fan running fast means overheating...........

Find where the air is exhausted from the computer and see if it blowing strong.
See if it is blowing hot air in volume or cool air.

only a little air would indicate that the heat sink is plugged with dust.
Cool air would indicate that the HeatPipe that transfer the heat from the cpu to the heatsink is bad.
Or that the mounts for the heatsink to the motherboard have broken. I've seen it on certain model Dells.

Some details on what is coming out of the fan outlet would help.

Also if you can see the heatsink fins are they hot or cold?

The computer is blowing out hot air, and the heatsink fins are hot.

#4 MrBruce1959

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Posted 20 October 2011 - 05:34 PM

Hello and welcome to Bleeping Computer.

The laptop my be running hot because the heat sink of the processor may still have dust clods embedded in it or there is an air channel that is not getting the required intake of cooler air.

Laptops can be harder to clean out even with compressed air, sometimes it actually requires gaining physical access to the processor heat sink.

Also I want to mention that compressed air is not always successful at removing dust that is stuck on the cooling fan blades. In some cases it requires removal with a toothbrush.
The dust can also cause a cooling fan to rotate off center, hence the noise you hear coming from the laptop.

If you have to remove the bottom cover, please post the make and model number and I'll try and find some decent directions for gaining physical access to your laptops heat sink and cooling fan.

Bruce.

Edited by MrBruce1959, 20 October 2011 - 05:37 PM.

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