This specific unit is typically configured for natural gas

and Tempstar gas furnaces

reducing energy loss and improving system efficiency

specifically sized for the 250 model variants

reliable switching is critical

Resideo C554A1794 Flame Detector 321894-708 This specific unit is typicallyThe Resideo C554A1794 Flame Detector is a high performance cadmium sulfide flame detector designed for precise photoconductive flame sensing in modern oil fired heating systems. This industrial grade sensor is the direct replacement for 101932 and is specifically engineered for sequencing oil burner systems. To ensure long term reliability in harsh combustion environments, the plug in cell features a glass to metal hermetic seal that prevents internal