Chosen Solution
The fan is so noisy and I want to find a way to fix it.
Yes you can replace the fan but it’s probably going to be hard to find the part. Can you give any other part of model numbers on the computer.
As Allan already said, yes you can replace it. But you can try to renew the thermal paste first and remove the dust inside, before you order anything. This will probably reduce the noise. And if not, you can always replace the fan afterwards. If you have some trouble to find a new fan, you can also contact the manufacture and see if they have something for it.