Matthew G Baltimore , MD May 22, 2015 Appliance: Maytag Gas Dryer MDG7400AWW Maytag Dryer Mdg7400aww: Timer knob had to be pulled multiple times to start/restart dryer. How to replace Timer. Replaced timer after reading the comments on your website from others with the same timer knob problem. Video instructions certainly saved a lot of time. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes