773-277

This Goodman and Amana compatible air pressure switch is a vital safety component designed for residential gas furnaces and HVAC systems. Also known as an air proving switch, its primary function is to monitor the negative pressure generated by the draft inducer motor. By sensing a vacuum of -0.75" WC, the switch ensures that the combustion blower is operating at the correct speed and that exhaust gases are being safely vented through the flue. If the furnace fails to ignite or shuts down unexpectedly, a faulty pressure switch is often the cause. This high-quality replacement part helps restore reliable heating performance, prevents hazardous conditions, and ensures your furnace meets strict safety protocols before the ignition sequence begins.
Type: Air Pressure Switch
Size: Small
Application: Used in induced-draft gas furnaces and heating systems to verify proper airflow and venting before allowing ignition.
Specifications: Pressure Setting: -0.75" WC (Water Column); Function: Air Proving/Draft Verification; Compatibility: Specifically designed for Goodman and Amana forced-air heating units.