E05
Zanussi
Control PCB Communication or Power Supply Error
Microwave display shows E05 and unit will not start; sometimes appears after a power surge or lightning storm.
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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
Faulty main control board, Damaged low-voltage power supply on PCB, Loose wiring harness to control panel, Surge-damaged components
How to Fix / Troubleshooting
Safety first: Disconnect the appliance from mains power.
- Power reset: Leave the microwave unplugged for at least 10 minutes to allow internal capacitors to discharge. Plug back in and check if E05 clears.
- Inspect power cord and outlet: Verify the outlet has correct voltage and is not loose. Avoid using extension leads.
- Check control panel connections: Remove the outer cover and control panel (after unplugging). Inspect the ribbon cable and connectors between the keypad/display and main PCB. Reseat all connectors firmly.
- Look for PCB damage: Examine the main control board for burnt components, cracked solder joints, or bulging capacitors. Any visible damage usually requires board replacement.
- Replace control board: If E05 persists and wiring is sound, replace the main control PCB with the exact Zanussi part number.
Because this involves live-voltage circuitry, non-professionals should limit themselves to power reset and visual checks, then call a technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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