Customer Questions and Answers for Dryer Timer by Whirlpool

Hello Ray,
You should check the ducting since this design has no control board which would cause the same symptom. If the unit advances on the timed dry cycle but not on the automatic cycle, this will be the cause. To prove this is the issue you can remove the duct from the rear of the unit and run it for about 10 minutes. You will see that the timer has advanced if the issue is the duct.