Bomann
Insulation Fault / Short Circuit in Heating Circuit
Oven trips the household circuit breaker or RCD when heating starts
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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 chassis, Damaged wiring insulation touching metal, Moisture inside elements or wiring, Faulty main control board component shorting to ground
How to Fix / Troubleshooting
Safety: Do not repeatedly reset a tripping breaker. Disconnect power and investigate.
Steps:
- Note which function causes the trip (grill, bottom heat, fan, etc.). This points to the suspect heating element.
- With power off, disconnect the suspect element and test resistance from each terminal to the oven chassis. Any low resistance indicates a short; replace the element.
- Inspect wiring harnesses near hot areas for melted insulation contacting metal.
- Allow the oven to dry for 24 hours if there has been steam cleaning or spillage; moisture can cause temporary leakage.
- If all elements and wiring test fine, a shorted component on the main control board may be responsible and should be checked by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Upper Heating Element
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