York S1-024-39479-000 Pressure Switch 318973-401 Engineered for R-22 systems and

Engineered for R-22 systems and compatible with POE oil for potential retrofits

generating the precise static pressure needed to pull flue gases through the heat exchanger and close the pressure switch safely

Is this unit compatible with LED lighting loads

The 4-3/4” copper float and high-grade replacement gasket ensure a professional-grade seal and reliable proportional feed action

It is commonly used to switch multiple legs of a load

York S1-024-39479-000 Pressure Switch 318973-401 Engineered for R-22 systems andThe York S1 024 39479 000 Pressure Switch is an OEM critical safety component specifically calibrated to a 0. 33 WC set point. Designed for precise monitoring of the inducer motor's venting performance, this differential air pressure switch ensures the combustion process only initiates when proper static pressure is maintained. As a direct replacement for S1 024 25975 000, this unit resolves common sequence of operation failures where the circuit