Set the measuring cup underneath the water dispenser. Press and release the water dispenser for five seconds at a time until three gallons of water is dispensed into the measuring cup.
Pour out the measuring cup's water and set the cup underneath the dispenser. Hold "Settings" and "Lock" on the refrigerator's front control panel simultaneously for three seconds. The control buttons prepare the water dispenser for calibration mode, which configures the refrigerator's measured fill feature.
Release the buttons, and press your hand against the water dispenser lever to fill the measuring cup up to 1 cup of water.
Release your hand from the lever to stop filling the measuring cup and complete the calibration mode.