Oven overheats and burns food even at low temperature settings.

Safety first: Disconnect power immediately if overheating occurs to prevent fire risk.

Checks:

• Measure the temperature sensor resistance at room temperature; a very low resistance suggests a shorted sensor. Replace if faulty.
• Inspect the sensor mounting; ensure it is correctly positioned and not touching a heating element.
• Remove the control board and inspect the heating element relays for welded contacts (burned or stuck closed). Replace the board if relays are defective.
• After replacing components, verify temperature accuracy with an oven thermometer and adjust calibration if the model supports it.