Why is my PS4 overheating?

Hello,

I recently cleaned out my PS4 as it hasn’t been cleaned since I brought it, there was a lot dust that I got out. When in the process I broke the shell that the fan wire sits in, this is the wire that is Red/Black/Grey in that sequence and it connects to the green motherboard. I purchased a new shell and replaced it. I started the PlayStation and I could here the fan finally working. However, after starting up a game the fan kept getting louder and louder and it sounded like a jet. The PS4 flashed a red light because it was overheating then it shut itself down. I then replaced the thermal paste and all the thermal pads in the PS4. I thought this would work but it’s doing the exact same thing, I start it up and it flashes red and shuts itself down.

Ive taken all the measures to stop the PS4 overheating; Cleaning the dust out the fan and the rest of the PS4, used new thermal paste on the chip and replaced all thermal pads.

Can someone please help me as during lockdown I can’t take this to a shop to get repaired.

Thanks, Ben.