The York S1-02545231000 Hot Surface Ignitor is a silicone nitride ignition component designed for compatible York gas furnaces and HVAC heating systems. It operates by heating electrically to a high temperature, igniting the gas-air mixture in the burner assembly to initiate combustion. Its durable construction supports reliable ignition and consistent heating operation. Ideal for fur... https://www.partshnc.com/york-s1-02545231000-hot-surface-ignitor-silicone-nitride