The Whirlpool WP3977678 Dryer Timer is the central component of your dryer's control system. This crucial element controls the heat, tumble, and cool down times, which in turn controls the drying cycle. See it as the conductor of an orchestra, making sure that every phase of the drying process goes without a hitch. The timer is an integral part of the dryer's control panel. It takes user input regarding desired cycles and converts it into precise instructions for the dryer's drum motor and heating element. Your clothing will dry quickly and completely with a working timer, preventing the possibility of either over- or under-drying. You may get the dryer working again and enjoy flawlessly dried clothing by replacing a broken controller.