If the switch opens below 650 PSI

or the motor pulling excessive Amps while humming without rotation

This part features a 1

It is standard practice to replace the drier whenever the system is opened for service or a major component fails

Nidec-US Motors 9721 Motor 323055-751 If the switch opens belowField proven and built for the rigors of commercial refrigeration, the Nidec US Motors 9721 Motor is a specialized 3 in 1 multi horsepower powerhouse designed to streamline local truck stock. Engineered as a direct replacement for PD1127, this 3. 3 inch diameter motor provides a reliable retrofit for hundreds of OEM shaded pole evaporator fan applications found in Heatcraft, Bohn, and Chandler equipment. Featuring a Permanent Split Capacitor (PSC)