Eric J Elgin , IL July 26, 2018 Appliance: Jenn-Air Refrigerator JCD2389GES Jenn-Air Refrigerator Jcd2389ges: Fridge not defrosting. How to replace Defrost Control Board. Watched the video and did the part replacement. Simple as it could be! Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes