The Whirlpool WP4456836 Range Cooktop Speed Control Switch regulates the selected operating level of a compatible cooktop element, providing control over cooking heat. This electrical switch responds to the user’s setting and adjusts the power supplied to the designated heating element according to the range’s control design. It allows users to select appropriate heat levels for different cooking tasks, supporting convenient and controlled operation. A properly functioning switch provides responsive adjustment and consistent control of the cooktop setting. Replacing a worn or faulty switch can restore heat-level selection and address certain control-related issues.