this furnace limit switch monitors internal plenum temperatures to prevent heat exchanger damage

Designed for Clockwise (CW) rotation (facing the intake side)

ensuring accurate response to downstream demand

this requires a physical press of the reset button to re-engage the circuit after a high-pressure trip has occurred

Built with a rugged stainless steel valve body

York S1-025-41339-000 TXV 30067439-890 this furnace limit switch monitorsThe York S1 025 41339 000 is an OEM grade 1. 5 Ton Thermostatic Expansion Valve (TXV) engineered for precision refrigerant metering in residential and light commercial HVAC systems. Designed as a direct replacement part, this York thermal expansion valve features a 3 8x3 8 inch ODF connection and includes a 60 inch capillary tube, providing the necessary lead length for clean routing even in compact evaporator cabinets. By modulating the flow based on