E12
AEG
Low Voltage / Power Regulation Fault
E12 appears; machine may shut down unexpectedly or reboot during operation.
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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 PCB, Loose mains connector, Intermittent wiring harness connection, Overloaded internal power rail due to shorted component
How to Fix / Troubleshooting
Safety: Unplug the appliance before opening the housing.
- Check mains cable: Inspect the power cord and plug for damage or overheating. Replace if any defects are found.
- Secure connectors: Open the machine and check that all power connectors on the main PCB and to the pump, heater, and grinder are firmly seated.
- Visual PCB inspection: Look for bulging electrolytic capacitors or burn marks on the power supply section of the PCB. Replace the PCB if damage is evident.
- Avoid overloading: Ensure the coffee maker is not sharing a circuit with high-load appliances that may cause voltage dips.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board (Power Supply Section)
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