773-290

This premium air pressure switch is a vital safety component for residential gas furnaces and HVAC systems. Calibrated to a -0.33" WC set point, this air proving switch ensures that the draft inducer motor is operating correctly and venting combustion gases safely before allowing the heating cycle to continue. A common solution for furnace ignition failures and pressure-related error codes, this switch is engineered for precision and long-term reliability. By monitoring the vacuum pressure within the heat exchanger, it protects your home by preventing operation under unsafe venting conditions. Ideal for professional HVAC technicians and DIY repairs alike, this part restores proper functionality to compatible heating equipment.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Gas furnaces, rooftop package units, and residential heating systems requiring an air proving safety sensor.
Specifications: Pressure Setting: -0.33" WC (Water Column); Function: Air Proving/Safety Interlock; Compatibility: Single-stage heating systems.