This HVAC replacement part is the standard specification for mid-range pressure delivery in modulating gas systems and fixed-orifice burners

it utilizes 3/4" ODF suction and 1/2" ODF discharge sweat connections

making it a staple for HVAC service kits and boiler repair applications across residential and commercial heating systems

a trip is a diagnostic indicator that airflow or combustion gas removal is compromised

heat-damaged housing

York S1-025-31812-000 Rollout Switch This HVAC replacement part isThe York S1 025 31812 000 Rollout Switch is a critical safety component designed for specific furnace burner assemblies where precise thermal monitoring is non negotiable. This 270 degree furnace switch functions as a NC (normally closed) limit that opens when excessive heat is detected outside the combustion chamber, preventing hazardous conditions resulting from flue gas spillage or heat exchanger breaches. As a manual reset rollout switch, it