Unplug the refrigerator. Turn off the inlet shutoff valve that supplies water to the refrigerator located behind the unit. Use a wrench to disconnect the water line located beneath the refrigerator door.
Locate the reservoir behind the crisper drawers. Pull these water lines through the refrigerator cabinet and remove.
Place a flathead screwdriver into the pair of slots beneath the water dispenser cover on the front of the refrigerator. Turn the flathead carefully and snap off the lower end of the dispenser cover. Slide the cover in an upward motion to remove from the refrigerator.
Loosen the water line leading to the dispenser. Slide the tube through the opening in the door. Remove the line from the refrigerator.
Rinse each water line thoroughly with water. Flush out each line, removing any blockages. Replace any damaged lines. Return each line to the refrigerator. Reconnect water lines, turn on valve and restore power.