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the S1-3948-3051 is compatible with a wide array of York condensing units and heat pumps
This is a specific 4-leg design
Its non-spring return logic ensures the valve fails in place during power loss
Verify the temperature rise against the data plate after replacement
Always verify your specific wiring diagram and terminal requirements before installation
York S1-1TVMCA1 TXV Kit 318973-401 the S1-3948-3051 is compatible withWhen you are upgrading or maintaining a split system, the York S1 1TVMCA1 is the professional grade solution for managing superheat in older R 22 refrigerant units. This genuine OEM thermal expansion valve (TXV) kit is optimized for 1. 5 to 2. 5 ton applications, specifically for York air handlers and indoor coils like the CM, CF, and CU series. Engineered with a 3 4 inch Chatleff connection, this bolt on valve facilitates a secure, leak free
