Washer shows F26, may not start or may stop unexpectedly, sometimes with door lock issues.

Safety first: Unplug the washer before working on the door area.

Step-by-step:

• Check door closure: Ensure the door closes firmly and is not sagging. Adjust hinge if needed.
• Inspect door lock: Access the door lock assembly and check for loose mounting screws or physical damage.
• Test switch contacts: With the lock removed and power off, test continuity across the door switch contacts when the latch is engaged. Replace the lock if contacts are intermittent or open.
• Inspect wiring: Verify the harness from the lock to the control is intact and connectors are fully seated.

When to call a technician: If the control board is not recognizing a good door switch signal, board-level diagnosis is needed.