York S1-7990-3591 Limit Switch the JB U1-6B is a

the JB U1-6B is a standard HVARC component for creating reusable

when used with a standard 45

blocked return vents

extending the service life of expensive electrical components

York S1-7990-3591 Limit Switch the JB U1-6B is aFor 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