Display shows "LOC" or a lock icon; buttons do not respond and cycle cannot be started.

Safety first: This is not a hardware fault in most cases; no need to unplug unless panel is unresponsive.

Step-by-step checks:

• 1. Disable control lock: Press and hold the designated Control Lock button (often the "End of Cycle Signal" or a padlock-labeled key) for 3–5 seconds until the lock icon disappears. Refer to your user manual for the exact button.
• 2. Power reset: If the lock will not clear, unplug the unit for 1 minute, plug back in, and try again.
• 3. Panel test: If some buttons do not respond, the UI panel may be faulty and require replacement.