helping you troubleshoot flame sensing issues or blower speed deviations without unnecessary downtime

ensuring the unit operates safely down to 0°F

Operating on a rate-compensated principle

making it ideal for managing multi-stage heating or cooling loads

Simplified Installation: Standardized mounting bracket and connection points allow for rapid field replacement by contractors

York S1-025-42680-000 Expansion Valve 321702-401 helping you troubleshoot flame sensingThe York S1 025 42680 000 Expansion Valve is a critical metered flow control component engineered for precise refrigerant management in R410A HVAC systems. Designed for high efficiency York evaporator coils and air handlers, this thermostatic expansion valve (TXV) dynamically adjusts refrigerant flow based on the current heat load, ensuring the system maintains optimal superheat levels. By preventing liquid slugging and evaporator freezing, the S1 025