How do I lock the dispenser to prevent children from using it?

Press and hold the LOCKOUT button for 3 seconds to lock the dispenser. Press and hold LOCKOUT a second time to unlock it. Note that the lock feature does not shut off power to the product, the ice maker, or the dispenser light — it simply deactivates the ice and water dispensers. (Page 7)

From the official Whirlpool Refrigerator (Owners-Manual-231850) manual, page 7

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