Karen W Omaha , AR January 24, 2022 Appliance: Whirlpool Electric Dryer WED4815EW1 Whirlpool Dryer Wed4815ew1: The timer knob stripped. How to replace Knob Kit. After searching and watching videos, I determined that the only way to fix my dryer was to replace the entire timer. I also needed a new knob for the timer. Unfortunately, you can not purchase just 1 knob, you have to purchase a package that contains 1 of each of the knobs on the panel. The repair was very easy! There was a video on the AppliancePartsPros website that showed exactly how to make the repair. You do not have to be an expert to make this repair. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes