Prusa FDM 3D Printers

20 known error codes

10101 Moderate

Firmware Update Failed - Flash Process Did Not Complete

12201 Easy Fix

MINTEMP Hotend - Thermistor Reading Below Minimum Threshold

12202 Moderate

MAXTEMP Hotend - Temperature Exceeds Maximum Safe Value

12203 Moderate

THERMAL_RUNAWAY Hotend - Temperature Deviated Beyond Safe Range

12211 Moderate

MINTEMP Bed - Heated Bed Thermistor Reading Too Low

12212 Moderate

MAXTEMP Bed - Heated Bed Temperature Exceeds Safe Maximum

12213 Moderate

THERMAL_RUNAWAY Bed - Heated Bed Temperature Unstable

12301 Moderate

X-Axis Homing Failed - Stallguard Did Not Trigger

12302 Moderate

Y-Axis Homing Failed - Stallguard Did Not Trigger

12303 Moderate

Z-Axis Homing Failed - Z Probe Did Not Trigger

12401 Moderate

USB Communication Error - Serial Connection Lost

12501 Moderate

Loadcell Measurement Error - Nozzle Force Sensor Malfunction

12601 Easy Fix

Filament Sensor - No Filament Detected

12602 Easy Fix

Filament Autoload Failed - Sensor Detected Filament But Loading Did Not Complete

13201 Easy Fix

Power Panic - Unexpected Power Loss Detected

17201 Moderate

MMU Communication Error - Multi Material Unit Not Responding

17301 Moderate

MMU Filament Feeding Error - Filament Did Not Reach Extruder

17302 Moderate

MMU Tool Change Failed - Material Switch Did Not Complete

21201 Easy Fix

Hotend Fan RPM Too Low - Cooling Fan Underperforming

21202 Easy Fix

Print Fan RPM Anomaly - Part Cooling Fan Speed Inconsistent