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 Relay Brd/Sheild. 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