Steven D Sheridan , MT November 17, 2018 Appliance: Whirlpool Electric Range RF3620XVW0 Whirlpool Range Rf3620xvw0: Burner knob broke. How to replace Range Knob Set (Includes 9 Black Knobs). Had to take off the face of the control center as the knob rod had slipped inside. Reattached the rod and slipped on the knob. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes