Andrew H Tumwater , WA January 18, 2016 Appliance: Jenn-Air Electric Cooktop JEC8430ADB Jenn-Air Cooktop Jec8430adb: Needed to replace burner knobs. How to replace Knob. Replaced burner knobs for third time. Very easy repair of a terribly engineered product. It's nothing to do with AppliancePartsPros. You guys are great. 6 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes