773-399

This professional-grade air pressure switch is a critical safety component designed for HVAC systems and gas furnaces. Often referred to as an air-proving switch, it monitors the pressure differential created by the inducer blower motor to ensure the system is venting combustion gases safely. With a precision-calibrated set point of 0.18" WC (Water Column), this switch acts as a safeguard, preventing the ignition sequence if proper airflow is not detected. If your heating system is failing to ignite or shutting down prematurely, a replacement pressure switch may be required to restore safe and efficient operation. This component is built for durability and high-cycle reliability in residential and commercial heating equipment.
Type: Air Pressure Switch
Size: Small Component
Application: Used in gas-fired furnaces, rooftop package units, and light commercial heating systems to verify proper airflow and exhaust ventilation.
Specifications: Pressure Set Point: 0.18" WC (Water Column); Function: Air Proving and Safety Cut-off.