Description
The York S1-02439490000 SPNO Air Pressure Switch is an essential control component used to monitor air condition levels within combustion chambers. It is designed to detect a pressure drop at approximately -0.21 inches water column, triggering a switch response when conditions fall below the set threshold. In heating and cooling equipment, it supports proper airflow before ignition or continued operation, supporting safe system performance. The switch is installed in furnaces and packaged HVAC systems units, where it interfaces with control boards to enable or interrupt system operation based on airflow conditions.
