The Whirlpool WPW10270254 is a range surface infinite switch, also called a smoothtop control knob or endless control switch. This knob, which is mounted on the cooktop surface of your Whirlpool range, is usually composed of plastic or metal. It operates as a conduit between you and the electric burner under the stove. You can control the power supplied to the element and thus the heat intensity indefinitely by turning the endless switch. An infinite switch offers a more accurate and intuitive method of regulating cooking temperature than conventional rotary knobs with preset temperature settings. The WPW10270254 replaces a broken or malfunctioning switch, giving you back control and guaranteeing that you may keep using your Whirlpool appliance's precise temperature regulation and culinary flexibility.