Richard M Monroe , NY July 18, 2014 Appliance: Maytag Gas Dryer MGDC400VW0 Maytag Dryer Mgdc400vw0: The timer would not advance also gas valve would not operate correctly. How to replace Dryer Timer (4-Cycle). I ordered a timer and two solonoids for the gas valve. Problem solved dryer backin service. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes