773-065

Ensure your heating system operates safely and efficiently with this high-quality 2-stage air pressure switch. Designed as a critical safety component for high-efficiency gas furnaces, this air proving switch monitors the negative pressure generated by the draft inducer motor. It confirms that the exhaust system is venting properly before allowing the ignition sequence to proceed, preventing the buildup of dangerous flue gases. Engineered for two-stage heating cycles, it features precise set points of -0.55" WC and -0.95" WC to manage both low-fire and high-fire furnace operations. This right-side mounted switch is the ideal replacement for HVAC systems experiencing ignition failures, pressure switch lockout codes, or intermittent heating issues.
Type: Air Pressure Switch
Size: Medium
Application: Used in residential two-stage gas furnaces to monitor draft inducer pressure and ensure safe venting during the heating cycle.
Specifications: 2-Stage functionality; Dual set points: -0.55" WC / -0.95" WC; Right-side mounting orientation; Snap-action electrical contacts; Designed for vacuum-sensing applications.