Description
The York S1-02435760000 Air Pressure Switch is a differential air flow sensing component calibrated to 0.67″ water column, used to verify that sufficient draught or induced airflow is present before allowing system operation to continue. It respond to changes in pressure created by the inducer or blower by opening or closing an electrical circuit at a preset threshold. In HVAC systems, it is used in furnace and air-handling assemblies, where it monitors combustion airflow condition and confirms proper venting before ignition or sustained operation. It ensures safe startup sequences, stable combustion performance and shutdown protection under airflow conditions.
