Customer Questions and Answers for Dryer Timer by Whirlpool

Joe, No, it's not likely you need a timer WP8299764 if the timer operates properly on one cycle,but not on another there's a very high chance, you have heat issue, usually a clogged or restricted exhaust vent pipe or vent hood, not a timer issue. On the "auto dry" cycles, the dryer has to reach the proper temperature(155 dgrs.) in order to complete the circuit to the timer motor so the timer can advance. If the temperature isn't correct, the timer won't operate properly.