thermal_runaway
Moderate
Anycubic · FDM 3D Printers
Hotend Temperature Exceeded Safety Limits
Quick Answer
Error code THERMAL_RUNAWAY on your Anycubic FDM 3D Printers means: Hotend Temperature Exceeded Safety Limits. 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 the printer immediately and allow the hotend to cool
2
Inspect the thermistor wire from the heat block all the way to the mainboard for damage
3
Verify the heater cartridge is firmly seated in the heat block with the set screw tightened
4
Run PID autotune via a serial terminal: M303 E0 S200 C8 then M500 to save
5
Replace the silicone sock if it is missing or degraded
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
NTC 100K thermistor
Silicone sock for heat block
24V 40W heater cartridge
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