Customer Questions and Answers for Dryer Electronic Timer by Whirlpool

Kristy, the difference is the internal contacts in the timer itself. you will need to determine the part needed by the " series" number of the dryer ( the first two digits of the serial number) series 10 through 40 will need the WP33001730 timer, and series 41 and above will need the WP33002676. They are not interchangeable, so you'll need to verify the serial number and order the correct part number based on that.