Customer Questions and Answers for Dryer Timer by Whirlpool

Jim, it would be recommended that the vent is cleaned out to ensure there is not an airflow issue through the vents. If there is not a grounded connection or wire, the next step would be to inspect the blower wheel WP697772. If the blower wheel does not rotate with the motor, it will cause air to not flow through and heat the cycling thermostat WP3387134. However, the hi-limit thermostat WP3390291 should cause the element to cut off at 250°F if the cycling thermostat does not heat up properly to cut off at 155°F. Based on the information that has been provided, there is an airflow issue which can be from the blower wheel or from the ventilation being clogged up.