this hot surface ignition (HSI) kit includes the essential gaskets

Manual Isolation: Provides a reliable shut-off point for field service and refrigerant recovery procedures

Bypassing a HVAC fusible link is never recommended

Plug-and-Play Connectivity: Equipped with factory-molded connectors to ensure a moisture-resistant and vibration-proof seal at the control interface

making it a versatile choice for facility managers and contractors

York S1-025-39911-000 Expansion Valve 340155-7026 this hot surface ignition (HSI)The York S1 025 39911 000 Expansion Valve is a precise OEM thermostatic metering device designed for 3 ton R 22 refrigeration systems. This thermostatic expansion valve (TXV) utilizes a 3 8" x 3 8" connection and features a 30 inch capillary tube to ensure accurate superheat regulation across varying thermal loads. As a direct OEM replacement part, it maintains factory spec refrigerant flow, preventing liquid slugging and evaporator starving. For