Reginald L La Habra , CA July 05, 2021 Appliance: General Electric Gas Cooktop CGP650SET3SS Ge Cooktop Cgp650set3ss: I had a couple of broken knobs on my cooktop. How to replace Control Knob Kit. Replace knobs with GE OEM parts from Appliance Parts Pros.com. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes