Washer-dryer combo will not start; display shows F22 and door remains unlocked or lock light flashes.

Safety first: Unplug the appliance before working around the door lock. Do not force the door closed.

Step-by-step checks:

• Inspect door strike: Check the plastic strike on the door for cracks or misalignment. Replace if damaged.
• Check door alignment: Ensure the door closes evenly and fully engages the lock. Adjust hinges if sagging.
• Access door lock: Remove the front panel or door boot clamp to reach the door lock assembly. Inspect for broken plastic or burn marks.
• Test lock: With a meter, check continuity across lock terminals when the lock is energized (requires service manual procedure). Alternatively, if visibly damaged or intermittent, replace.
• Inspect wiring: Verify the harness from the lock to the control board is intact and firmly connected.

When to replace: Replace the door lock assembly or door strike if defective. If a new lock does not clear F22, the main control board may not be sending or reading the lock signal correctly.