The Frigidaire 318037700 surface unit spark switch controls ignition to ensure reliable lighting of your range’s surface burners. This component is designed to activate when the burner knob is turned, sending an electrical signal to generate a spark that ignites the gas. It works as part of the ignition system, coordinating with other switches to provide consistent and timely burner startup. Built for compatibility with select range models, it offers a dependable replacement for worn or malfunctioning switches. Benefits include improved ignition reliability, safer operation, and smoother burner control, helping maintain efficient and consistent performance during everyday cooking tasks.