773-397

This high-performance HVAC air pressure switch is a critical safety component designed for residential gas furnaces and high-efficiency heating systems. Functioning as an air proving switch, it monitors the pressure generated by the draft inducer motor to ensure that exhaust gases are being properly vented before the ignition sequence begins. If your furnace is failing to ignite, short-cycling, or displaying airflow-related error codes, this replacement pressure switch can restore safe and efficient operation. Its dual-action calibration ensures precise monitoring for multi-stage heating units, protecting your home and your equipment from venting hazards.
Type: Air Pressure Switch
Size: Standard HVAC replacement part
Application: Used in forced-air gas furnaces and residential heating systems to verify proper inducer motor airflow and venting safety.
Specifications: Dual setpoint configuration: 0.35" WC / 0.90" WC; Air proving functionality for furnace safety circuits.