Oven shows E9 and heating stops; may be associated with tripped safety thermostat.

Safety first: Disconnect mains power. Allow the oven to cool fully before attempting any reset.

• Locate safety thermostat: On many Clatronic ovens, a small round or rectangular thermostat is mounted on the top of the oven cavity or rear panel, often with two terminals.
• Check for manual reset: Some thermostats have a small red or black reset button. Press it firmly to reset. If it clicks, it was tripped.
• Test continuity: With the oven cold and power disconnected, test the thermostat with a multimeter. It should show continuity. An open reading indicates a failed thermostat.
• Inspect ventilation: Check that cooling vents are not blocked and that the cooling fan operates correctly. Overheating can repeatedly trip the thermostat.
• Replace thermostat: If the thermostat will not reset or remains open, replace it with the correct temperature-rated Clatronic safety thermostat. Ensure good contact with the mounting surface for accurate temperature sensing.