How do I enable or disable the Control Lock feature?

Press and hold the Control Lock button for 3 seconds to enable it; the Lock indicator will turn on and all controls will be disabled. When Control Lock is on, the refrigerator does not dispense ice or water even if the Dispenser Lever is pressed. To deactivate, press and hold Control Lock for 3 seconds again. The Lock indicator blinks if any button is pressed while it is active. (Page 22)