Jeffrey J Greenfield , IN December 10, 2018 Appliance: Jenn-Air Electric Range JES9860CAS02 Jenn-Air Range Jes9860cas02 / : Jenn Air downdraft oven doesn't keep oven temperature level up. How to replace Oven Control Board. Replaced the Jenn Aire control board again. They last about 2 years. Straight-forward to replace, as you only have to remove 6 screws to tilt the whole panel front out and replace board, but annoying that the manufacturer's board is so unreliable, not to mention the cost of the board. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes