Smeg pyrolytic oven shows Er13 during or after a self-clean cycle.

Safety first: Allow the oven to cool completely and disconnect from mains power. Do not attempt to open a locked door by force.

• Ventilation check: Confirm that cabinet ventilation meets Smeg specifications and that vents are not blocked.
• Cooling fan operation: During pyrolysis, the cooling fan must run continuously. After cooling, test the fan in a normal cooking mode. If it does not run, inspect and replace the cooling fan motor as needed.
• Check pyrolytic thermostat: Access the top or rear of the oven to locate the pyrolytic safety thermostat. Some have a manual reset button; press to reset. Test continuity with a multimeter; replace if open-circuit when cold.
• Test high-temp sensor: Many pyrolytic models use a dedicated high-temperature NTC. Test its resistance at room temperature and compare with specifications. Replace if out of range or open/shorted.
• Control board: If all hardware is good and Er13 recurs, the main control board may be mismanaging pyrolytic temperature and should be replaced by a technician.