As a critical OEM replacement part

In many York rooftop units

This assembly features a robust pilot burner and integrated flame sensor (thermocouple/thermopile logic) to ensure precise signal transmission to the ignition module

check for carbon buildup or replace the sensor

Reznor 209121 Fan Blade 30067439-890 As a critical OEM replacementThe Reznor 209121 Fan Blade is a critical OEM replacement part designed for high static unit heater applications, ensuring optimal heat exchanger cooling and consistent CFM delivery. This 23 inch diameter fan blade features a precision engineered 35 degree pitch and a 3 blade configuration to balance air movement with motor load efficiency. Operating with a counter clockwise (CCW) rotation, it integrates seamlessly with 1 2 inch bore motor shafts,