By utilizing a rotary compressor design

ensuring a reliable flooded-start protection for York HVAC systems and industrial refrigeration units

You should only use the SP10972 if it is the specific cross-referenced part for your model

some 903162 kits include the seal

including MOT12215

Carrier HK42ER227 Motor Module 321702-401 By utilizing a rotary compressorThe Carrier HK42ER227 is a genuine OEM replacement ECM motor module designed specifically for 1 3 HP X13 blower motors. This module serves as the programmed control logic for the constant torque motor, regulating airflow across various static pressures to maintain system efficiency. Engineered for Carrier, Bryant, and Payne air handlers and furnaces, the HK42ER227 motor control manages the brushless DC motor commutation, ensuring precise ramp up