Eileen R Howell , NJ August 02, 2019 Timer knob Simple to replace. I knew it would be simple because when I had it under warranty, it happened. The part was mailed to me in advance of the repairman. I watched him -- and when it happened again after the warranty was over, I realized I could order it and replace it. Thankfully I found this site and the right part. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes