York 3400-3151 Limit Switch providing reliable protection against heat

providing reliable protection against heat exchanger breaches or venting obstructions that cause flames to escape the combustion chamber

This disc is suitable for two-position steam service up to 70 psi

Key Benefits Direct OEM Replacement: Engineered as the precise replacement for part number 800173F

and 53 series brackets

York 3400-3151 Limit Switch providing reliable protection against heatThe York S1 3400 3151 Limit Switch is a critical safety component designed for high limit thermal protection in residential and commercial HVAC systems. This OEM replacement part is engineered to monitor furnace plenum temperatures, specifically calibrated with an open point of 175F and a close point of 125F. As an automatic reset limit switch, it eliminates the need for manual intervention once temperatures return to safe operating parameters.