¶ 1. Phenomenon description
The screen displays "Error, key: 2564, the extruder is not heating as expected."
¶ 2. Cause analysis
2.1 Nozzle heating malfunction；
2.2 Thermosensitive detection malfunction.
¶ 3. Troubleshooting and solution
3.1 Check whether the nozzle heating and thermal wire are inserted in place;
3.2 Check whether the ceramic heating ring is damaged;
3.3 Check whether the heat-sensitive seat and heating rod seat are loose;
3.4 Check whether the nozzle drag chain line is loose and has no binding tape.
