Washer-dryer combo shows E91; no or invalid communication with user interface.

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.

Possible Causes

Defective user interface board, Damaged ribbon cable, Loose connectors, Faulty main control board communication port

Safety: Unplug the appliance.

1. Check ribbon cable: Inspect the cable between the display/control panel and main board for kinks or damage. Replace if necessary.
2. Reseat connectors: Firmly reconnect both ends of the cable.

If the error remains, either the user interface or main control board must be replaced. This is typically a professional repair.

Hard 4/5

User Interface Board

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