The Carrier 345810-402 Ignitor/Flame Sensor is an HVAC replacement component designed for compatible Carrier gas furnaces. It performs two essential functions: the ignitor initiates burner ignition during the heating cycle, while the flame sensor detects the presence of a stable burner flame and helps the control system maintain safe operation. This component supports dependable start... https://www.partshnc.com/carrier-345810-402-ignitor-flame-sensor