I recently had my Ultimaker 3 Extended printing over night and as I came back in the morning to look at the print I saw an absolute disaster. The Material didn't print properly and somehow managed to find its way back up the side of the nozzle and onto the heaterblock. I immediately tryed to remove the printcore which was a mistake because not only was I unable to do so because of all the plastic clogging the entrence, but the display now also showed an error message which stated a max temp. error. I restarted the printer which made the error dissapear. Then I heated the core up to 210C and re
