Gary B Fort Calhoun , NE September 09, 2014 Appliance: Model MDE 6400 AYW The timer was defective on my dryer and wouldn't start when the knob was pulled Replaced the timer, however the wrong timer was sent so I had to reorder the proper timer. Turns out there was a production change for my dryer so it took a different part. The second timer worked perfect. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes