Lochinvar & A.O. Smith 100109908 Flame Sensor 320819-301 For systems requiring the valve

For systems requiring the valve to close on temperature rise

accommodating standard commercial power supplies

Fail-Safe Operation: The manual reset with power outage feature ensures that critical low-water conditions are addressed by a technician before the burner resumes operation

though it is typically factory-configured for Natural Gas

Lochinvar & A.O. Smith 100109908 Flame Sensor 320819-301 For systems requiring the valveThe 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