How often should your Refrigerator Water Filter be changed? Most manufacturers say 6 months but for a family of 4 it should be every 3 - 4 months. Most families want great tasting refrigerator ice and water. This means changing your refrigerator filter 3 times(every 4 months) per year instead of 2 times(every 6 months) per year. If your ice maker is on the blink, get help and Replacement Ice Maker Parts from us. We have discount prices on major brand filters and ice maker parts from Whirlpool, Maytag, Jenn-Air, Kenmore, Coldspot, Sears, GE, Hotpoint, Frigidaire, Electrolux and more.