773-174

This high-performance -0.55" WC Air Pressure Switch is a vital safety component designed for gas-fired furnaces and HVAC heating systems. Often referred to as an air proving switch, its primary role is to monitor the pressure differential generated by the draft inducer blower. By confirming that the exhaust system is venting correctly and maintaining the proper vacuum level, this switch allows the ignition sequence to proceed safely. It is an essential replacement part for resolving common furnace issues such as ignition failure or 'pressure switch stuck open' error codes. Engineered for reliability and precision, this sensor ensures your heating equipment operates at peak efficiency while protecting against the buildup of hazardous flue gases.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Used in residential and light commercial gas furnaces, forced-air heating systems, and HVAC units to verify proper inducer motor operation and exhaust venting.
Specifications: Pressure Rating: -0.55" WC (Water Column); Function: Air Proving/Safety Interlock; Media: Air