Lochinvar & A.O. Smith 100109908 Flame Sensor 320819-301 Always verify the airflow direction

Always verify the airflow direction of the existing fan blade before installation

accommodating standard commercial power supplies

For systems requiring the valve to close on temperature rise

though it is typically factory-configured for Natural Gas

Lochinvar & A.O. Smith 100109908 Flame Sensor 320819-301 Always verify the airflow directionThe Lochinvar & A. O. Smith 100109908 Flame Sensor is a critical OEM replacement part designed for precise flame rectification in high efficiency water heaters and boilers. As a seasoned tech, you know that a failing flame sensor rod is the primary culprit behind intermittent data signals and "no flame detected" lockouts. This genuine factory part (formerly identified as part number 9004520215) ensures the flame sensing circuit maintains the microamp