E91
AEG No Communication from User Interface

Dryer display may light but controls are unresponsive; E91 logged as communication error.

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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

Defective user interface PCB, Disconnected UI harness, Control board communication failure

How to Fix / Troubleshooting

Safety first: Unplug the appliance.

  • 1. Check UI harness: Access the control panel and ensure the harness from the UI to the main board is properly connected.
  • 2. Inspect UI board: Look for signs of moisture damage or burnt components.
  • 3. When to call a technician: UI or main board replacement is typically required for E91 faults.
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Repair Difficulty

Hard 4/5

Required Part

User Interface PCB
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