Michael E Owings Mills , MD April 07, 2015 Appliance: Jenn-Air Surface Unit- Ddraft Gas CVG4280B Jenn-Air Cooktop Cvg4280b: I needed new control knobs. How to replace Top Burner Control Knob. I REMOVED THE OLD CONTROL KNOBS BY PULLING THEM UP BY HAND. AND PUSHED DOWN THE NEW KNOBS INTO THE D CONFIGURATION. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes