The Whirlpool W11122877 is a range surface igniter, which is an important component that starts the flame on your Whirlpool cooktop burner. This is a small, spark plug-like device located near the burner head. When you turn a burner knob, electrical electricity is directed to the igniter. This current generates a high-voltage spark, which jumps the gap between the igniter and the burner cap. This spark ignites the gas coming from the burner opening, resulting in the characteristic flame used for cooking. The W11122877 igniter works with a variety of Whirlpool, Estate, KitchenAid, and Roper range models. A defective igniter can cause aggravating situations in which your burner fails to ignite, even when gas is flowing.