Lee G Charlotte , NC May 01, 2020 Appliance: Model WJRR4170WW The control knob was not activating I ordered a new control knob and timer dial. It arrived quickly and I installed it within minutes using a needle nose pliers. As before, using Appliance Parts Pros was very easy and their customer service is first rate. I highly recommend them. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes