E20
Zanussi
Overcurrent / Overload Protection Trip
Microwave shows E20 and stops; fan may continue running for a while after error appears.
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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
Shorted high-voltage component, Shorted heater element (combo models), Faulty current-sense circuit on power board, Internal wiring short to chassis
How to Fix / Troubleshooting
Safety first: Unplug immediately. Do not continue to operate a microwave that trips overcurrent protection.
- Visual inspection: With the cover removed and capacitor safely discharged (for trained persons), inspect wiring and components for burn marks, melted insulation, or arcing.
- Check for loose objects: Ensure no screws or metal pieces have fallen inside and are bridging connections.
- Isolate subsystems: Technicians may disconnect high-voltage or heater circuits to identify the shorted section.
Due to the risk of fire and electric shock, E20 faults should be handled by a professional technician.
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Repair Difficulty
Professional Required
5/5
Required Part
High Voltage Transformer
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