Washer-dryer shows F18, may not complete cycle or may freeze mid-program.

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

Interference or fault on internal communication bus, loose harness between modules, failing control board

Safety first: Disconnect from mains.

Check internal connections:

Reseat harnesses: Remove top cover and reseat all connectors on the main control board, especially those leading to any secondary modules (e.g., motor control, UI).
Inspect for moisture: Look for signs of water ingress on or near the control board and wiring. Dry thoroughly and correct any leaks.

Next steps: If F18 recurs, the main control board may be defective and require replacement.

Hard 4/5

Main Control Board (Power Module)

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