Unlike standard plumbing fittings

Reusing old gaskets often leads to micro-leaks that compromise system efficiency

this component ensures exact mechanical fitment and electrical consistency

Repeated tripping usually indicates restricted airflow

and Luxaire equipment

York S1-7990-3591 Limit Switch Unlike standard plumbing fittingsFor technicians servicing York, Coleman, or Luxaire equipment, the York S1 7990 3591 is a critical OEM furnace limit switch designed for precision thermal monitoring. This auto reset limit switch is engineered with a snap action contact system that opens at 180F and automatically closes at 150F, ensuring the HVAC blower motor and burners operate within safe operational parameters. As a genuine Source1 repair part, it offers exact physical and