Reznor 209973 Flame Sensor while the 41-401N is the

while the 41-401N is the silicon nitride upgrade

35 Amp threshold provides sensitive detection for low-load status monitoring applications

this device provides the precise sensing depth required to reach the optimal airflow path within the plenum

The Browning BX62 is precision-ground to minimize belt-induced vibration

the sensor may have drifted and requires replacement

Reznor 209973 Flame Sensor while the 41-401N is theThe 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.