Oven trips the circuit breaker or RCD when heating is started.

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

• Visual inspection: Remove rear and top covers. Look for burnt wires, melted connectors, or signs of arcing.
• Element insulation test: With all wires disconnected from elements, use a megohmmeter (insulation tester) if available to check resistance between each element terminal and chassis. Low resistance indicates leakage; replace the element.
• Check for moisture: If the oven was recently cleaned with excessive water or steam, allow it to dry for 24–48 hours and retest.
• Wiring repair: Replace any damaged wires with high-temperature-rated cable and secure away from sharp edges.

Warning: Earth leakage faults can be dangerous. If you lack proper test equipment, contact a qualified electrician or technician.