you must verify that the 9-inch diameter and 6-inch width clear your existing blower housing and that the rotation matches your original fan

the pinouts are proprietary to York equipment to ensure proper communication and variable speed functionality

Enhanced Airflow Precision: Calibrated specifically for induced draft systems to prevent pressure switch trip-outs

OEM Compatibility: Replaces JCI York 473-20937-001

and safety shutoff protocols

Lennox 78F43 Blower Shaft R-410A you must verify that theThe Lennox 78F43 Blower Shaft (OEM Model LB 50255C) is a critical mechanical component engineered for heavy duty application in industrial and residential air handling units. Machined from high grade C1045 carbon steel, this 1 inch diameter shaft is designed to withstand high torque loads and continuous rotational cycles within the blower assembly. With a precision cut length of 27. 25 inches, it features a standardized 1 4" keyway and a flat for