Mary K West Nanticoke , PA February 04, 2020 Appliance: KitchenAid Electric Range KESS907SWW04 Kitchenaid Range Kess907sww04: Plastic or nylon part of stove knobs (kitchen aid) were broken for 4th time. How to replace Range Control Knob. I simply replaced the knobs. Just frustrating because this small part surrounding metal rod to attach knobs is obviously defective and should be improved by Kitchen Aid. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes