How to Fix / Troubleshooting

Safety first: Do not repeatedly reset a tripping breaker. Disconnect the oven and leave it off until inspected.

Steps to check:

With power disconnected, visually inspect all heating elements and wiring for signs of arcing, burns, or crushed insulation.
Use a multimeter on insulation resistance (or at least continuity) between each element terminal and the oven chassis; any continuity indicates a faulted element.
Check the mains filter module near the terminal block for cracks or burn marks; replace if damaged.
Allow the oven to dry for 24 hours if there has been recent steam cleaning or spillage; moisture can cause temporary leakage.
Replace any element or wiring that shows leakage to earth.

Warning: Insulation resistance testing at high voltage should be performed only by qualified technicians.

Oven trips the circuit breaker or RCD as soon as a heating function is selected.

Possible Causes