How do I lock the dispenser and control panel on the LSC27931**?
Press and hold the ALARM/LOCK button for 3 seconds to lock the dispenser and all control panel functions. Press and hold the button again for 3 seconds to unlock. This feature prevents unintended use of the dispenser and controls. (Page 11)
From the official LG LSC27931 French Door Refrigerator manual, page 11
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