 it very likely has a water filter that needs regular replacement. And typically that's about every three months. Some refrigerators have a sort of a timer built in that will tell you when it's time to replace it. But it's real important that you do replace that because you don't want to let that get too dirty. It's just going to stop working and it could get to a point where you have some sort of growth happening inside of it that you just don't want.