We used the first filter that came with our fridge & then when it was ready to replace we just removed it & never replaced it with a new one. Fortunately, you don't even need a filter in the fridge in order to run the ice maker. They are probably making them now where you have to have a filter actually in the slot before the ice maker will work (not sure about that but I wouldn't put it past the manufacturers to start making them that way.)