Main oven overheats, burns food quickly, or shows F03 during use

Safety: If the oven is overheating, switch off power immediately at the wall and consumer unit. Do not continue using the appliance until the fault is resolved.

• Visual inspection: After cooling, remove the rear panel. Locate the main oven overheat thermostat (usually a small round device with two terminals mounted on the rear of the cavity). Check for signs of overheating or discoloration.
• Test overheat thermostat: With power off, disconnect one terminal and test continuity. At room temperature, most cut-outs should show continuity. If it is open and has a manual reset button, press the button. If it will not reset or repeatedly trips, replace it.
• Check temperature sensor: Test the main oven NTC sensor resistance. A shorted sensor can cause the board to under-read temperature and overheat the oven. Replace if out of spec.
• Control board relays: Inspect the PCB (if accessible) for burnt or welded relay contacts controlling the main oven element. If relays are damaged, the entire board should be replaced.
• Do not bypass safety devices: Never bypass the overheat thermostat or sensor; this is extremely dangerous.