This WH9 lower thermostat is the officially authorized update for the legacy 9000507005 and 9000507015 models

this genuine HVACR replacement part ensures your automated control valves maintain peak operational efficiency and safety compliance

As a self-aligning ball bearing

Advanced Seal Integrity: Prevents air leakage and maintains static pressure for optimal furnace performance

extending the lifespan of connected mechanical equipment in demanding industrial environments

York S1-373-39504-004 Conversion Kit 322055-301 This WH9 lower thermostat isThe York S1 373 39504 004 Gen2 Compressor Conversion Kit is a specialized service component designed for high precision HVAC compressor retrofitting. As a veteran technician, you know that field swapping compressors requires exact compatibility to maintain system integrity. This Generation 2 conversion kit allows for the seamless upgrading of HVAC systems by adapting older compressor footprints to modern, high efficiency secondary designs. Engineered