The Carrier LH33ZS004 Hot Surface Ignitor is a reliable ignition component designed for safe and efficient burner startup in gas-fired HVAC systems. It operates by heating to a controlled high temperature when energized, igniting the gas-air mixture to begin the heating cycle. Commonly used in Carrier gas furnaces and packaged heating units, this ignitor helps ensure consistent igniti... https://www.partshnc.com/hot-surface-ignitor-49