Ice machine water filters are a necessity for the purest, cleanest ice from your ice machine. These filters help to remove contaminants that may also affect the way your ice tastes and smells. Ice machine filters provide other benefits as well, filtering out minerals and debris that may damage ice machines or reduce its production. Some companies will extend the warranty of their ice machines with the use of a water filter, while other warranties may be voided or limited if your water quality is poor. If your ice machine consistently makes use of lower quality water, it may require repairs and maintenance more often..