E12
Amica
Low-Voltage Power Supply Instability
Microwave shows E12; clock and display may flicker or reset intermittently.
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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
Failing power supply capacitors on control PCB, Loose mains filter connections, Faulty line filter board, Poor mains connection at terminal block
How to Fix / Troubleshooting
Safety: Disconnect from mains before opening the unit.
- Check mains connection: Inspect the power cord, plug, and internal terminal block for loose screws or heat discoloration.
- Inspect line filter: Locate the mains filter/EMI board. Check for burnt components or cracked solder joints.
- Control board inspection: On the main PCB, look for bulging or leaking electrolytic capacitors in the low-voltage section.
- Reseat connectors: Reseat all low-voltage connectors between the filter board and control PCB.
- Replace faulty board: If components are visibly damaged or E12 persists, replace the line filter board or main control PCB as appropriate.
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Repair Difficulty
Hard
4/5
Required Part
Line Filter Board
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