thermal-runaway Troubleshooting

Thermal runaway error on the SUNLU TPU Filament TPU 95A 1.75mm

Source: Reddit r/3Dprinting — troubleshooting Confidence: 60% Verified Aug 9, 2026

The printer reports a thermal runaway and shuts down to prevent a fire risk. The thermistor or heater may be faulty.

How to fix Thermal runaway error

Check the thermistor

Inspect the thermistor wiring and reseat it in the hotend. Replace if damaged.

Source: Reddit r/3Dprinting — troubleshooting Confidence: 60% Verified Aug 9, 2026
Difficulty: ★★★ Est. 20 min

Verify the heater cartridge

Check the heater cartridge is seated and not shorting. Replace if faulty.

Source: Reddit r/3Dprinting — troubleshooting Confidence: 60% Verified Aug 9, 2026
Difficulty: ★★★ Est. 20 min

Replacement parts for the SUNLU TPU Filament TPU 95A 1.75mm

SUNLU TPU Filament TPU 95A 1.75mm Nozzle SUNLU TPU Filament TPU 95A 1.75mm Hardened Steel Nozzle SUNLU TPU Filament TPU 95A 1.75mm PLA Filament SUNLU TPU Filament TPU 95A 1.75mm Build Plate SUNLU TPU Filament TPU 95A 1.75mm Hotend Assembly SUNLU TPU Filament TPU 95A 1.75mm Magnetic Bed Sheet SUNLU TPU Filament TPU 95A 1.75mm PTFE Tube SUNLU TPU Filament TPU 95A 1.75mm Nozzle Set

← All SUNLU TPU Filament TPU 95A 1.75mm error codes

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