Zanussi Electrical Short or Earth Leakage

Oven trips the household circuit breaker or RCD when turned on

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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 mains cable or terminal block, Moisture ingress in wiring or elements, Faulty filter or suppression capacitor on PCB

How to Fix / Troubleshooting

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

Step-by-step checks:

  • 1. Visual inspection: Check the mains cable, plug (if fitted), and terminal block for burning or exposed wires. Repair or replace as needed.
  • 2. Insulation test of elements: With the oven disconnected, use a megohmmeter (insulation tester) between each element terminal and earth. Any reading below 20 MΩ suggests leakage; replace the element.
  • 3. Check for moisture: Look for signs of water ingress from above (worktop spills) or from steam. Dry thoroughly and retest.
  • 4. Inspect suppression components: On the PCB, check the mains filter and capacitors for cracking or burning. Replace the board or filter module if damaged.

Warning: RCD tripping often indicates earth leakage; this must be resolved before safe use.

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Repair Difficulty

Professional Required 5/5

Required Part

Oven Heating Element, Mains Terminal Block, Mains Filter
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