E91
Electrolux
Communication Error Between Main Control and User Interface
Dryer displays E91 and does not start
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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
Disconnected or damaged communication harness, Failed user interface board, Failed main control board, Power surge damage
How to Fix / Troubleshooting
Safety first: Unplug the dryer before working on the control area.
- Inspect harness: Remove the top panel and control console. Locate the communication harness between the UI and main board. Ensure all connectors are tight and free of corrosion.
- Check for physical damage: Look for pinched or cut wires, especially where the harness passes through metal openings.
- Swap boards (advanced): If you have access to known-good boards, swapping the UI or main board can isolate the faulty component. Otherwise, replacement is best left to a technician.
Because E91 involves board-level communication, professional diagnosis and board replacement are often required.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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