Display shows F18; machine may freeze mid-cycle or not respond to commands.

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

Loose serial communication harness, Faulty display board, Faulty main control board, Electrical noise or surge damage

Safety: Unplug the washer-dryer before removing panels.

Reseat connectors: Access both the main PCB and the display/UI board. Disconnect and reconnect the communication harness or ribbon cable.
Inspect for damage: Look for pinched cables, corrosion, or burnt components on either board. Replace damaged harnesses.
Isolate the fault: If available, substitute a known-good display board or main PCB to determine which is faulty. In most domestic situations, replacing the main PCB is the common fix.

Hard 4/5

Main Control Board (PCB)

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