Oven overheats and burns food even at low temperature settings; exterior may feel excessively hot.

Safety first: Turn off the oven and isolate from mains immediately to prevent fire risk.

Checks:

• On models with a mechanical thermostat knob, test the thermostat for continuity; it should open when the set temperature is reached. Replace if it remains closed.
• On electronic models, test the NTC sensor resistance; a shorted sensor will cause the oven to overheat. Replace if readings are too low.
• Inspect the main PCB for a relay that may be welded closed; if suspected, replace the PCB.
• Verify that the safety thermostat has not been bypassed by previous repairs; restore correct wiring and replace the thermostat if necessary.

Warning: Overheating can damage cabinets and wiring; do not continue using the oven until the fault is corrected.