Washer stops mid-cycle and displays F11; may not respond to commands or may freeze during spin.

Safety First: Disconnect power before accessing control boards. Static discharge can damage electronics; ground yourself before touching boards.

Step-by-step checks:

• Access controls: Remove the top panel to access the main control (CCU). On some models, the motor control (MCU) is located at the base or rear.
• Reseat connectors: One at a time, unplug and firmly reconnect all harnesses between the CCU, MCU, and user interface. Look for bent pins or corrosion.
• Inspect harness: Follow the harness between boards and check for pinched, cut, or abraded wires, especially where they pass through metal openings.
• Check board mounting: Ensure boards are securely mounted and not vibrating excessively, which can stress solder joints.

When to replace: If wiring and connectors are sound but F11 persists, replace the motor control board first (if separate). If the issue remains, the main control board or user interface may need replacement.