York S1-026-34726-001 Limit Switch technicians often use high-temp silicone

technicians often use high-temp silicone RTV on cut surfaces or seams as specified in Lochinvar service manuals

This 150F CO auto limit switch fits many Goodman/Amana units

the 221729A is for units without a display

While this is a standard LP orifice

providing an exact physical and electrical match for the original York limit switch

York S1-026-34726-001 Limit Switch technicians often use high-temp siliconeThe York S1 026 34726 001 Limit Switch is a critical safety component designed for precise thermal regulation within York, Luxaire, and Coleman HVAC systems. This SPST (Single Pole Single Throw) fixed temperature switch operates on a 110 140F automatic reset cycle, meaning it breaks the electrical circuit if the plenum temperature exceeds 140F and restores continuity once it drops to 110F. As a direct replacement for S1 2702 314P A, this OEM component