At removing the fan. Try not removing the 1 screw near the heat sink. Because if you dont have an strong screwdriver, or screwdriver designed for the cpu heatsink/cooler. The temp will go crazy. Try to copy the tension on the other heatsink screw if you did removed it. I think i tensioned it nearly tight. And it came back normal. But tanks for the tutorial because an stupid cockroach egg got inside to my cooling system. Im still using it in 2022 works like a charm.