Bush oven shows E12 and trips the household circuit breaker when a cooking function is selected.

Safety first: Do not repeatedly reset a tripping breaker. Isolate the oven and verify no power is present before inspection.

• Identify when it trips: Note whether the breaker trips as soon as the oven is turned on, or only when a specific function (e.g., grill, fan oven) is selected. This helps locate the faulty circuit.
• Inspect elements and wiring: Remove rear and top panels. Look for signs of arcing, burnt insulation, or melted connectors on the elements and wiring harness.
• Insulation test (if available): Use an insulation tester (megger) between each element terminal and earth. A low resistance reading indicates leakage; replace the affected element.
• Check mains filter: Inspect the mains interference filter near the terminal block for cracks or burn marks. Replace if damaged.
• Dry out moisture: If the oven has recently been steam-cleaned or exposed to moisture, allow it to dry thoroughly (door open, power off) for 24 hours, then retest.
• If tripping persists: Further diagnosis with proper test equipment is required; contact a qualified appliance technician.