773-222

This high-quality replacement air pressure switch is a vital safety component for residential HVAC heating systems. Functioning as an air proving switch, it is designed to monitor the negative pressure generated by the furnace inducer motor. Its primary role is to ensure that the combustion blower is exhausting flue gases properly and that the venting system is free of obstructions before allowing the heating cycle to proceed. If the switch fails to detect the correct pressure, it prevents ignition to ensure safe operation. Calibrated to a precise -0.70" WC set point, this switch is essential for restoring reliable performance to your gas furnace or heating unit.
Type: Air Pressure Switch
Application: Commonly used in gas-fired furnaces and HVAC heating equipment to verify proper venting and inducer motor operation.
Specifications: Pressure Set Point: -0.70" WC (Water Column); Function: Air Proving and Safety Shut-off