Washer displays F11, may stop mid-cycle, sometimes accompanied by intermittent operation or random resets.

Safety first: Unplug the washer before removing any panels. Control boards are sensitive to static; ground yourself before handling.

Step-by-step:

• Access controls: Remove the top panel to access the CCU and the rear or lower panel to access the MCU (if separate on your model).
• Inspect harness: Locate the multi-wire harness connecting CCU and MCU. Disconnect and inspect both ends for corrosion, bent pins, or loose terminals.
• Reseat connectors: Firmly reconnect all harness plugs to the CCU and MCU. Ensure they latch fully.
• Check for vibration damage: Look for signs of wires rubbing against the cabinet or drum, which can cause intermittent shorts.
• Visual board inspection: Examine both CCU and MCU for burnt components, cracked solder joints, or discoloration.
• Test operation: Reassemble panels, restore power, and run a diagnostic or quick wash cycle to see if F11 returns.

When to call a technician: If F11 persists after reseating and inspecting wiring, one or both control boards may need replacement. Board-level diagnosis is best handled by a professional.