Hi @t3p3tony, I disassembled the print head and checked every wiring. Therey may have been a loose wire behind the tool fan, I'm not completely sure. I also changed the wires of the thermistor as I suspected these most likely to be the problem.
Since then the printer worked without any further incident - I will carefully check the next prints.
I can't really comprehend why the resistor R21 of temp0 is damaged now but I would really like to have it repaired because the temp0 port is at a better position for my wiring. Any suggestions?
