Nozzle seems to be clogged


I have printed roughly 2,5 kg PLA so far without major problems. But suddenly the nozzle seems to be clogged.
I’m using PLA3Y1 @ 216°C.

So I have to disassemble the Hotend-unit (standard Hotend which comes with the K8200).

Do you have any recomandations / experience?

Should the Hotend be cold or hot while removing the nozzle?

By the way: the fan makes terrible noise at medium speed. It’s the sheapest fan I have ever seen…

Whatsoever the K8200 is a great machine.