extending the service life of the equipment while ensuring the system operates at peak fuel-to-steam efficiency

this "pounds-to-inches" component allows technicians to achieve a precise 1-2 PSI outlet pressure range (approximately 27" to 55" w

It is the official manufacturer-specified 621486 replacement

The 1980 series features a robust construction utilizing a combination of copper and nickel alloys to ensure maximum electrical conductivity and a consistent 30mV output for reliable gas valve operation

which helps lower head pressure and improve system performance

York S1-024-35780-000 Pressure Switch extending the service life ofThe York S1 024 35780 000 Pressure Switch is a critical safety component designed for precise HVAC draft inducer motor monitoring. This SPNO (Single Pole Normally Open) switch features a fixed set point of 1. 0" WC (Water Column), engineered to close on a fall in pressure. As an authentic OEM York replacement part, it ensures exact calibration for residential furnaces and package units, maintaining the necessary pressure differential for safe