Ps4 Overheated even though I cleaned it of dust, cause?

So we start that my ps4 was very loud about a year ago, then I looked on the Internet as the fan cleans. When the fan was clean again, the PS4 was quieter again. After a few months, the PS4 began to make very strange noises that sounded different than the first time. The sounds sounded like a saw cutting off the wood. Sometimes there was a loud squeaking. It would be so blatant that I could not turn on the ps4 because it was just too loud. After waiting for a few months, the ps4 went back to normal, but then the ps4 did not start to emit a single sound when it turned on and went off after about 10-15 minutes for overheating. I do not know why that is because I have cleaned the fan several times. Maybe you know the cause I do not want to spend 100 euro to send them to repair. I'm sure if I know the cause I can fix it myself. Is it probably because of the heat paste or is the fan over? Sorry that it was such a long text

Sounds like "storage problem" of the fan.

Does the "noise" stop because you block the fan once as a test?

Then first install a new fan and then watch the matter.

What exactly do you mean with fan blocking

Open housing, switch on when there's a sound, bravely stop the fan so that it stops rotating.
If it is then "quiet", the bearings are worn and a new fan due.

Oh so thank you, I'll give it a try