Microwave displays E20 and may not start; sometimes appears after a short circuit or tripped household breaker.
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.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: Internal shorts in a microwave can be extremely dangerous and may involve high-voltage components. Do not continue to operate the unit if breakers trip or E20 appears.
User-level actions:
- 1. Inspect power cord: Check for cuts, burns, or crushed sections. If damaged, do not use the microwave.
- 2. Dry the unit: If E20 appeared after liquid spilled inside or heavy condensation, unplug and allow the unit to dry for 24 hours with the door open.
Technician-level actions:
- Open the cabinet and visually inspect for burned wires, arcing marks, or melted insulation.
- Test the high-voltage capacitor and magnetron for shorts to ground.
- Repair or replace damaged wiring and components as needed.
Recommendation: Due to the risk of electric shock and fire, E20 faults should be handled by a qualified technician.
Repair Difficulty
Required Part
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