773-059

This premium air pressure switch is a vital safety component designed for high-efficiency HVAC systems and forced-air furnaces. Calibrated to a precise 0.34" WC (Water Column) set point, this air proving switch monitors the pressure differential created by the draft inducer motor. It ensures that the combustion blower is operating correctly and that the venting system is clear of obstructions before allowing the heating cycle to proceed. A functioning pressure switch is essential for preventing the buildup of dangerous flue gases and ensuring reliable ignition. If your furnace is failing to light or cycling off unexpectedly, this replacement pressure sensor provides a reliable solution to restore safe and efficient heating performance.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Designed for use in residential and commercial gas furnaces to monitor draft inducer blower performance and flue venting safety.
Specifications: Set Point: 0.34" WC (Water Column); Function: Air Proving/Differential Pressure Sensing; Purpose: Combustion safety and airflow verification.