Open the refrigerator's right door. Locate the cartridge, which is on the interior back wall. Turn the cartridge to the left to remove it.
Turn the new cartridge's adapter to the left to remove it from the cartridge. Fill the new cartridge with cool water to prepare it for use.
Position the arrow on the cartridge directly below the arrow on the cartridge holder. Gently insert the cartridge into the holder and turn it to the right until the cartridge is securely attached to the port.
Close the refrigerator door and press the water dispenser on the front of the left fridge door for five minutes. The cartridge is ready to use when the water dispenser pushes water through the cartridge for five minutes.
Touch "Filter Replaced" on the refrigerator's LCD control panel, or push "Set Features" on the control panel and hold "On/Off" for 3 seconds when "Water Filter" is illuminated.