Steve B Irvine , CA June 19, 2016 Appliance: Maytag Gas Dryer MDG4000BWW Maytag Dryer Mdg4000bww: Dryer wouldn't turn off. How to replace Dryer Timer. Replace timer. It was very easy to replace. Nut driver was best choice for screws holding the timer in place but thin pliers could substitute. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes