John M Miami , FL October 07, 2014 Appliance: KitchenAid Ice Cube Maker KUIS18NNJB4 Kitchenaid Ice Machine Kuis18nnjb4: My ice maker's control board died probably it's power supply no indicator lights. How to replace Control Board. Originally I thought it was a Freon gas leak as the ice quantity and size diminished over two days. I installed a tap in the suction line to be able to re-charge and find the leak (happened to previous ice maker) but couldn't find a leak using a sniffer. Then I noticed the panel lights did not turn on. Control board replacement time. I replaced the control board by removing the top (4 screws) and then the cover of the control board (3 screws) changed to new board and recharged the Freon 11, The hard part was determining the proper charge of Freon. I found that 26 psi during the freeze cycle produced the best cubes. Would you like the failed board back?? John Martin 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes