E9
AEG
Internal Communication / EEPROM Fault
E9 is displayed and the cooker will not start; sometimes appears immediately at power-on.
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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
Corrupted firmware in control PCB, Failed EEPROM or microcontroller, Loose display-to-main-board connector, Power surge damage
How to Fix / Troubleshooting
Safety first: Unplug the multicooker before inspecting internal boards.
- Power cycle: Leave the cooker unplugged for at least 15 minutes to discharge internal capacitors, then reconnect and check if the error clears.
- Check connectors: Remove the control panel and verify that the ribbon cable between the display board and the main PCB is fully seated and not damaged.
- Inspect for surge damage: Look for burnt components, bulging capacitors, or scorch marks on the main PCB. If present, the board must be replaced.
- Firmware reset (if supported): Some AEG models allow a factory reset via a key combination (consult service documentation). Attempt a reset to clear corrupted settings.
- Replace main PCB: If E9 persists and no wiring issues are found, the main control PCB (with EEPROM/microcontroller) will likely need replacement. This is typically a technician-level repair.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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