SUNLU Filament Trockner S1 Plus — Error codes & fixes
Troubleshooting guide for the SUNLU Filament Trockner S1 Plus. Diagnose an error code and find the fix.
Thermal runaway error
thermal-runawayThe printer reports a thermal runaway and shuts down to prevent a fire risk. The thermistor or heater may be faulty.
Source: Reddit r/3Dprinting — troubleshooting
Confidence: 60%
Verified Aug 9, 2026
Layer shift / print shifted
layer-shiftThe print shifts mid-way, usually from a loose belt, a jammed axis, or a too-fast print.
Source: Reddit r/3Dprinting — troubleshooting
Confidence: 60%
Verified Aug 9, 2026
MINTEMP / thermistor error
mintempThe printer reports a MINTEMP error, indicating the thermistor is reading an abnormally low temperature.
Source: Reddit r/3Dprinting — troubleshooting
Confidence: 60%
Verified Aug 9, 2026
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