The heater and thermocouple are responsible for providing and maintaining the
appropriate temperature in the hotend during material loading and the printing
process. Also, the heater transfers the signal required for the printer to complete
the platform calibration. Therefore, if the extruder is overheating or the heating is
insufficient, or if your prints have blisters and hanging strands on their surface,
the heater and thermocouple may be faulty and require replacement. Also, the
extruder heating problems are indicated by the firmware messages: Error #010
Extruder heating error, Error #011 Extruder temperature is too high, and Error
#013 Unexpected extruder temperature drop. Sometimes, if you are unable to
finish platform calibration or if the nozzle hits the platform during the pre-print
calibration, it may be necessary to replace the heater and thermocouple.
Before replacing the heater and thermocouple, make sure that they are properly installed
in the hotend.
If you have the heater&thermocouple v1, you also have to replace the hotend and the
extruder PCB.
The following manual shows the M200 repair work. For the M300, these procedures are
the same.
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