How do I replace the PureSource 3 water filter?

Turn off the ice maker, push on the end of the filter to release it, then slide the old cartridge straight out and discard it. Slide the new cartridge into the housing until it snaps into place, then flush the system by dispensing water for about four minutes before turning the ice maker back on. It is not necessary to turn the water supply off to change the filter. (Page 23)