773-300

Ensure the safe and efficient operation of your heating system with this professional-grade 2-stage air pressure switch. Designed for high-efficiency gas furnaces, this dual-stage air proving switch acts as a critical safety sensor that monitors the venting process. It verifies that the inducer motor is creating the necessary vacuum to exhaust combustion gases before allowing the ignition process to proceed. This component is an essential replacement for furnaces experiencing startup failures, short-cycling, or pressure-related safety lockouts. With precision-tuned set points for two-stage heating cycles, this switch ensures your HVAC system operates at peak performance while maintaining strict safety standards.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: Used in high-efficiency two-stage gas furnaces and residential heating systems to monitor inducer motor draft and prove airflow safety.
Specifications: Dual-stage sensing functionality; Low-stage set point: -0.10" WC; High-stage set point: -1.27" WC; sensitive diaphragm construction for precise vacuum measurement.