Standardized Fit: The 1/2" NPT bottom connection and 2" stem length ensure compatibility with most standard boiler tapping points

This unit serves as the direct replacement for JD-2-GREY

Key Benefits: Steam-Rated Performance: Engineered for low-pressure steam (15 psi) and high-temperature hydronic fluids up to 250°F

This OEM-spec sensor features a high-grade Kanthal flame rod and a durable ceramic insulator

the sensor is likely defective

York S1-026-34028-005 Limit Switch Els PW 17895 Standardized Fit: The 1/2" NPTThe York S1 026 34028 005 Limit Switch is a mission critical OEM replacement furnace part designed for high limit protection in gas furnaces and air handling units. This automatic reset limit switch operates with a 180F opening temperature and a 150F closing temperature, ensuring the heat exchanger does not exceed safe operating parameters. As the direct replacement for S1 2702 338P A, this 150 180F AUTO limit control maintains precise thermal