Philip S Mansfield , MA September 15, 2017 Appliance: Model GTDX400ED3WS Ge dryer "timer" stopped functioning Watched repair video from Appliance Parts Pros and ordered the parts. The way the timer is attached is a little different than shown in the video but essentially the repair was easy. You must replace the knob when you do this repair. Examination of the original knob showed a crack across the center which made it impossible to turn the timer to the appropriate setting. The wires were not color coded so I took a photo with my phone to make sure I replaced them in the same position. The dryer runs as good as new. I took my wife out to dinner with the money I saved on the repair. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes