Error Codes & Alerts

Every error screen on the Core One shows a numbered code, a short description and a QR code that opens the matching article in the Prusa Knowledge Base.

Common ones

• Thermal errors (heater or thermistor): power off, check the Nextruder cables and connectors. Never bypass thermal protection.
• Loadcell / probing errors: usually a dirty nozzle or debris on the sheet. Clean both and retry.
• Filament sensor errors: the sensor did not see filament arrive. Recut the filament end and reload.
• Chamber temperature warnings: the chamber is hotter than the filament profile allows. Open the vents or the door for PLA.