E91
AEG
No Communication with User Interface
AEG washing machine shows E91, display may be blank or unresponsive
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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
Loose or damaged cable between main board and UI, Faulty user interface PCB, Control board communication fault
How to Fix / Troubleshooting
Safety first: Unplug the appliance.
- Inspect UI cable: Remove the control panel and top cover. Check the ribbon cable or harness between the UI and main board for damage and secure connections.
If cabling is intact, either the UI board or main board must be replaced; professional diagnosis is recommended.
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Repair Difficulty
Professional Required
5/5
Required Part
AEG User Interface Board
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