an "open pressure switch" fault code on the control board

streamlining inventory and on-site maintenance

this specific model is engineered for a 5/8" bore and will not fit a standard 1/2" shaft without an adapter

ensuring optimal mass flow rates through the 5/8" refrigerant line

the Trane MOT5421 offers a dropped-in solution that meets precise OEM specifications

York S1-311710 Coil 322055-301 an "open pressure switch" faultThe York S1 311710 Coil is a critical OEM replacement part designed for high performance fluid and gas flow management within industrial and residential HVACR systems. Operating on a 24V AC circuit at 50 60Hz, this 10W solenoid valve coil provides the precise electromagnetic force required for consistent valve actuation. Engineered for the MKC 2 solenoid series, it ensures seamless integration with Unitary Products Group (UPG) equipment, maintaining