Dena J Bridgeton , MO February 27, 2015 Appliance: Model 1989 JENN AIR COOKTOP 4 ELEMENTS The knob stems on the cooktop switchs were broken off Replaced all 4 switches and knobs. Parts arrived in just 2 days. Would have taken over a week from a local parts store and nearly 50% more expensive. Thanks Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes