Raymond W Tallahassee , FL July 27, 2015 Appliance: Model GE WBSR3140G1WW Control knob was worn and not engaging the timer Used needle-nose pliers to remove the clip and the old knob slid off easily. The clip was already in place on the new knob so I just pushed it on to the timer shaft. It took less than a minute. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes