Montpellier Earth Leakage / Short Circuit in Heating Circuit

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

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Heating element shorted to earth, Damaged wiring insulation touching chassis, Moisture inside elements or wiring, Faulty mains filter or suppression capacitor

How to Fix / Troubleshooting

Safety first: Do not repeatedly reset a tripping breaker. Disconnect the oven from the mains and only proceed if you are competent with electrical testing.

Steps to check:

  • Element insulation test: Disconnect each element and test resistance between each terminal and earth. Any low resistance indicates a breakdown and the element must be replaced.
  • Inspect wiring: Look for crushed, cut, or melted wires touching the metal chassis.
  • Dry moisture: If the oven was recently cleaned with excessive water or steam, allow it to dry thoroughly for 24 hours and retest.
  • Filter check: Inspect the mains interference filter for signs of burning or cracking; replace if suspect.
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Repair Difficulty

Professional Required 5/5

Required Part

Main Oven Heating Element
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