Jack N Missoula , MT May 03, 2015 Appliance: Jenn-Air Range-S/C S/I Gas & Elec Duel Fuel SVD48600BC Jenn-Air Range Svd48600bc: Ventilation fan not working. How to replace Range Oven Relay Board With Shield. By the 10th time, you get good at pulling out the stove and getting at the back to fiddle with circuit boards. Contact to relay board must have been broken when I was replacing main control board (cooling fan turns on at 200 degrees and stays on). Worst part was re-securing the ducting to the ventilation fan. No mishaps this last time. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes