The Whirlpool WP71002187 Range Switch Control Knob is a replacement component for your Whirlpool cooktop. It's the knob you use to turn on and control the heat on your burners. Rotating the knob triggers a switch, which transmits a signal to the burner control board. The control board then regulates the amount of power going to the burner element, resulting in heat intensity. This simple knob controls your stove and ensures exact cooking temperatures. Replacing a damaged or worn knob is a simple process that restores complete functioning to your range. With a new knob, you can effortlessly change heat settings and resume safe, controlled cooking.