Gary A Hamlin , WV January 16, 2017 Appliance: Jenn-Air Range- S/I Std Ddraft Ele D140-C Jenn-Air Range D140-C: Broken knob and missing knob. How to replace Knob- Cloc. Simply just pushed a new one on Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes