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F
e04
Easy Fix
FlashForge · FDM 3D Printers
Bed Temperature Sensor Fault - Bed Thermistor Reading Invalid
Quick Answer
Error code E04 on your FlashForge FDM 3D Printers means: Bed Temperature Sensor Fault - Bed Thermistor Reading Invalid. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Adventurer 5MAdventurer 5M ProCreator 3 ProCreator 4ADreamer NXGuider 3
Likely Causes
  1. Bed thermistor wire has been pinched or cut by the bed carriage mechanism
  2. Thermistor detached from the underside of the heated bed
  3. Thermistor connector oxidized from operating in a humid environment
  4. Bed thermistor has failed after prolonged high-temperature use
How to Fix It
1
Check the bed temperature display: a reading of 0C or an erratic jumping value indicates a sensor fault
2
Inspect the bed thermistor cable routing for pinch points or damage
3
Measure bed thermistor resistance (approximately 100K ohms at 25C)
4
Reseat the thermistor connector on the mainboard
5
If thermistor is detached from the bed, reattach with Kapton tape and thermal paste
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Replacement bed thermistor
Kapton tape
Thermal paste for thermistor mounting
Related Error Codes
E01E02E03E05E06
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