Timothy S Columbus , OH June 19, 2020 Appliance: Whirlpool Dryer WED4900XW0 Whirlpool Dryer Wed4900xw0: Whirlpool dryer timer not working. How to replace Dryer Timer. The clear and no-nonsense video showed clearly how to change out the timer and the ordering and shipping process was easy and fast. It took about as long to change the timer as it took to write this! A great experience! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes