Customer Questions and Answers for Dryer Timer by Whirlpool

Hello Michael, This is the exhaust duct. You see, if the exhaust is restricted, the moisture is blown past the felt drum seals back into the cabinet. Since the cabinet is the air intake, (note the vents on the units' back), the moisture is recirculated and passed across the sensors again. Since the moisture is sensed again, the voltage is still not sent to the timer motor so it cannot advance. Check the exhaust for crimps or clogs as this is the most probable cause and the most denied by customers. Remember the duct should be as short and straight as possible while being a full 4 inches for proper air flow. The felt seals cannot hold excessive back pressure.