Dwight J Siloam Springs , AR May 23, 2017 Appliance: KitchenAid Ice Cube Maker KUIS18NNTW1 Kitchenaid Ice Machine Kuis18nntw1: Control board malfunction ice grid not working properly. How to replace Cutter Grid Assembly (Clear Ice Machine). Install a new control board and ice grid. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours