Greg C Conroe , TX May 21, 2019 Appliance: Jenn-Air Electric Wall Oven JJW8230DDB Jenn-Air Oven Jjw8230ddb: Oven temperature was about 50 degrees off too hot. How to replace Clock Control (H2). Had to replace the control board. You need to pull the oven out from the cabinet about 6 inches to get to the screws 4 in total, 2 on each side. Then just unplug and plug in the new one and put back together. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes