bed_thermal
Moderate
Anycubic · FDM 3D Printers
Heated Bed Thermal Runaway - Bed Temperature Outside Safe Range
Quick Answer
Error code BED_THERMAL on your Anycubic FDM 3D Printers means: Heated Bed Thermal Runaway - Bed Temperature Outside Safe Range. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Power off and inspect the bed thermistor cable along its entire routing path for damage
2
Check that the thermistor is securely taped to the underside of the heated bed with Kapton tape
3
Measure bed thermistor resistance (approximately 100K ohms at room temperature)
4
Run bed PID autotune: M303 E-1 S60 C8 then M500 to save
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 bed thermistor with cable
Kapton tape
Replacement mainboard (if MOSFET issue)
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