The Burnham Boiler 103339-01 Flame Sensor Kit is a vital safety component designed to detect and confirm flame presence within a boiler’s combustion chamber. Working by sensing the flame’s electrical signal, it ensures the burner operates only when proper ignition is achieved, preventing unsafe fuel flow. Intended for use in Burnham hydronic boiler systems, it enhances operational rel... https://www.partshnc.com/103339-01-burnham-boiler-flame-sensor-kit