The Whirlpool WP74002328 is an essential component of your range's control panel. It is a knob or rocker switch that you may interact with directly. The switch sends a signal to your range's electrical control board when you turn or flip it. This signal informs the control board the burner or oven element you have selected. The control board may then use this information to manage the power to that particular element, giving you the ability to precisely change the temperature settings for the cooking zone you want. A correctly functioning indication switch is required if you want precise control over the cooking temperatures on your Whirlpool range. Without it, you wouldn't be able to select which element to utilize, making it impossible to cook on a range.