The Whirlpool WP3979618 Dryer Timer ensures proper drying cycles by controlling the duration and sequence of operations. This essential component regulates the dryer’s heating and tumbling functions, allowing clothes to dry efficiently. It works by advancing through different settings, activating the heating element and motor at precise intervals. Once the cycle completes, it automatically shuts off power to prevent overheating. This timer helps maintain consistent drying performance, prevents over-drying or damp loads, and optimizes energy use. Its simple operation enhances laundry convenience, ensuring clothes come out evenly dried and ready to wear.