773-270

This premium two-stage air pressure switch is a critical safety component designed for high-efficiency gas furnaces and residential HVAC systems. Functioning as an air proving switch, it monitors the pressure within the draft inducer housing to ensure the combustion blower is moving the correct amount of air for safe operation. Engineered for two-stage heating units, this switch features dual set points to handle varying airflow requirements during different firing stages. If your furnace is failing to ignite or triggering pressure switch lockout codes, this replacement part ensures the system detects proper venting before allowing the ignition sequence to proceed, maintaining both safety and energy efficiency.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Designed for use in residential two-stage gas furnaces and heating systems to monitor inducer motor performance and flue venting.
Specifications: Two-stage operation; Low-fire set point: -0.20" WC; High-fire set point: -0.55" WC; Dual-port sensing; Air-proving safety functionality.