773-101

This premium air pressure switch is a critical safety component designed for high-efficiency HVAC systems and gas-fired furnaces. Often referred to as an air proving switch or draft inducer switch, its primary function is to monitor the negative pressure generated by the inducer motor. By ensuring that the venting system is clear and air is moving correctly, this switch prevents the ignition sequence from starting under unsafe conditions. If your heating system is failing to ignite or experiencing frequent short-cycling, a malfunctioning pressure switch is a common culprit. This replacement part is precision-calibrated to maintain rigorous safety standards, ensuring reliable furnace operation throughout the heating season.
Type: Air Pressure Switch
Size: Small
Application: Commonly used in residential gas furnaces, HVAC heating units, and draft inducer blower assemblies to monitor vacuum pressure and ensure proper airflow before ignition.
Specifications: Open Rating: -1.59" WC (Water Column); Close Rating: -1.76" WC (Water Column); Function: Vacuum/Negative Pressure Sensing