e02
Moderate
FlashForge · FDM 3D Printers
Extruder Temperature Sensor Fault - Thermistor Reading Invalid
Quick Answer
Error code E02 on your FlashForge FDM 3D Printers means: Extruder Temperature Sensor Fault - Thermistor Reading Invalid. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Check the displayed temperature on the touchscreen: a reading of 0C or an extremely high value indicates a sensor fault
2
Measure thermistor resistance at room temperature (expect approximately 100K ohms for NTC 100K)
3
Inspect the thermistor cable and connector for visible damage
4
Reseat the thermistor connector on the extruder board
5
Replace the thermistor if resistance is out of specification
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Replacement NTC 100K thermistor (FlashForge OEM)
Thermistor cable harness
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