Technician-Friendly Calibration: Simple "one-touch" stroke initialization automatically synchronizes the actuator with the valve’s mechanical limits

legible data traces on standard circular charts

Engineered for drop-in compatibility

installing this specific 11x11 blower wheel is essential for eliminating vibration and balancing issues common with generic alternatives

York S1-373-39504-003 Conversion Kit 340793-762 Technician-Friendly Calibration: Simple "one-touch" strokeWhen you are performing a field upgrade on legacy York hardware, the York S1 373 39504 003 GEN2 Compressor Conversion Kit is the essential OEM solution for transitioning from GEN1 to GEN2 compressor technology. This kit is engineered to modernize existing residential air conditioning and heat pump units, ensuring seamless integration with original line sets and electrical configurations. As a veteran grade retrofit package, it eliminates the guesswork