773-055

This high-quality air pressure switch is a critical safety component designed for residential gas furnaces and HVAC systems. Often referred to as an air proving switch, its primary function is to monitor the negative pressure generated by the inducer motor to ensure the venting system is clear and operating safely. By verifying that combustion gases are being properly exhausted, this switch allows the furnace to proceed with the ignition sequence. If your heating system is experiencing ignition failure or displaying pressure switch-related error codes, this replacement part is essential for restoring reliable and safe heating performance. It is built to meet rigorous standards for durability and precise pressure sensing.
Type: Air Pressure Switch
Size: Small
Application: Gas furnaces, HVAC venting systems, and residential heating units requiring air proving safety sensors.
Specifications: Diaphragm-actuated sensor; monitors inducer blower draft; safety-critical ignition interlock.