supplemental weatherproofing may be required according to local mechanical codes

In a standard configuration

Manufactured from 1435 alloy and meeting ASTMB Standard #483

What is the difference between a 75 PSI relief valve and a standard 30 PSI boiler valve

shifting to 1/4" ID or 1/2" ID tubing is recommended to maintain signal accuracy

York S1-025-32693-000 Limit Switch supplemental weatherproofing may be requiredThe York S1 025 32693 000 Limit Switch is a critical high temperature safety component designed for York residential furnaces and HVAC systems. As an OEM replacement part, it ensures precise thermal monitoring within the heat exchanger assembly. This specific automatic reset limit switch is calibrated to open at 260F (260Op), effectively breaking the circuit to prevent overheating, and automatically closes at 230F (230Cl) once temperatures return to a