Oven overheats, burning food even at low temperature settings, exterior surfaces very hot

Safety: Immediately switch off the oven and disconnect from mains. Overheating can cause fire.

• Do not use: Do not continue using the oven until the fault is corrected.
• Sensor check: Test the temperature sensor for correct resistance. A shorted sensor can cause the control to overheat the cavity.
• Inspect relays: On the control board, check if any heating relays are welded closed (contacts stuck). This usually requires board replacement.
• Wiring verification: Ensure no elements have been incorrectly wired directly to mains bypassing control. This is rare but critical to check after previous repairs.
• Professional service: Because of the safety risk, have a qualified technician inspect and repair runaway heating issues.