Open the refrigerator's right door and flip the water filter's compartment cover inside of the refrigerator. The filter compartment is on the back wall and is covered to prevent accidental damage or removal.
Pull the filter out of the compartment and insert it back into place. Removing and inserting the filter ensures it is securely in place. Once inserted, the compartment door automatically lowers.
Push the compartment cover shut until it clicks the filter in place.
Close the refrigerator's door and set the measuring cup on the water dispenser tray. Press what Kitchen Aid terms as a "sturdy container" against the dispenser's pad for five seconds and release it. Wait 5 seconds and press the pad again for 5 seconds to flush the fridge's system.
Release and hold the water dispenser's pad until the measuring cup is eventually filled with 3 gallons of water during the flushing process.