Find the filter knob. It is usually located at the base of the refrigerator in the kickplate or grill. Turn the knob a quarter turn to the left to unlock the filter. Pull out and remove the old filter. Add a new filter and push in. Turn the filter a quarter turn to the right to secure it in place. Reset your filter indication light inside the refrigerator. Press down and release the switch five times within 10 seconds. The filter indication light should then turn green.