Oven overheats and burns food even when set to a normal temperature.

Safety first: Immediately turn off the oven and switch off the breaker if overheating occurs. Do not continue using the oven until the fault is corrected.

Step-by-step checks:

• Sensor test: After cooling, test the oven temperature sensor resistance at room temperature. A very low reading indicates a shorted sensor.
• Check relays: With power off, inspect the control board for welded or burnt relay contacts.
• Inspect wiring: Look for any direct shorts or bypassed safety devices in the element wiring.
• High-limit thermostat: Verify that the high-limit thermostat or thermal cutoff is intact and correctly wired.

When to replace parts: Replace a shorted temperature sensor immediately. If the heating relay is stuck closed, replace the electronic oven control board. Repair any wiring faults found.