Key Benefits Precision Safety: Calibrated for 170°F to 250°F operation to effectively manage thermal limits and protect the heat exchanger

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

the sensor is likely defective

this genuine OEM replacement part ensures the control board receives the precise signal needed to maintain safe operation and prevent error codes like the common 3-flash sequence associated with pressure circuit failures

York S1-026-34028-005 Limit Switch Els PW 17895 Key Benefits Precision Safety: CalibratedThe 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