Customer Questions and Answers for Dryer Timer (3-Cycle) by Whirlpool

Hello Elaine, The problem is most likely the exhaust duct. You see, the moisture sensor will continue to sense the moisture from the clothes if the back pressure from the exhaust duct is too high. The pressure that cannot escape through the exhaust will blow past the felt drum seals and gets recirculated across the clothes, and the moisture sensors. When this happens, the unit sees the moisture and discontinues the progression of the dry cycle. This causes the unit to run for a very long time and the clothes will still not seem to be drying. Of course the timed dry will cycle off because the moisture sensor is not used, but instead the timed dry is just that.....timed. After the preset time passes, the timer will time out. DO NOT use plastic pipe, foil pipe, or flexible plastic pipe, because it contributes to poor drying performance and collects lint, which can lead to a fire hazard. To identify flexible foil or plastic duct, pinch the coils of the duct between your fingers. If the coils can be brought together, do not use the duct. Use rigid or semi-rigid metal duct and exhaust the dryer to the outside by the shortest route possible. For the best exhaust system • Locate dryer so exhaust duct is as short as possible. • Verify old ducts are cleaned before installing new dryer. • Use 4" diameter rigid metal duct. • Use as few elbows as possible. • Use duct tape on all joints. Dryer exhaust duct MUST NOT terminate under the home. Do not use plastic or thin foil flexible ducting.