This indicator or pilot light is a manufacturer-approved replacement part for your stove or range. It comes on when the the stove is in use, indicating heat. The bulb can burn out over time and fail to turn on. Remove the screws on the back access panel in order to gain access to the indicator light. Depress the plastic tab on the inidicator light to pull it out. Remove the wires and clip them to the new light before mounting the light back onto the lens. Be careful not to break the lens during this procedure.