Precision Thermal Delay: Prevents cold drafts during startup and eliminates residual heat after shutdown to extend equipment life

Should I replace this gasket every time I pull the burner

this component ensures seamless mechanical and electrical integration

preventing sliding or disconnection

Its durable bimetal sensing element is calibrated for accuracy in high-cycle environments

Reznor 209973 Flame Sensor Precision Thermal Delay: Prevents coldThe Reznor 209973 Flame Sensor is a critical OEM replacement component designed for precise flame rectification in industrial and commercial gas fired heating units. Engineered for use in the PSE RZ11 pilot assembly, this sensor monitors the burner flame and transmits a microamp signal to the control board to verify ignition. A fouled or failing HVAC flame rod is a leading cause of intermittent short cycling and safety lockouts in Reznor unit heaters.