773-054

This 2-stage air pressure switch is a critical safety component designed for high-efficiency gas furnaces and multi-stage HVAC systems. As an essential air proving switch, it monitors the negative pressure generated by the draft inducer motor to ensure proper venting and airflow before the ignition sequence begins. Specifically engineered for dual-stage heating applications, this switch features two distinct set points—1.81 inch WC and 0.91 inch WC—to maintain optimal performance and safety during both low-fire and high-fire heating cycles. Replacing a faulty or failing pressure switch is vital when a furnace fails to ignite, experiences intermittent cycling, or throws a pressure switch lockout code. This high-quality replacement part helps restore the safe combustion cycle of your heating system, ensuring exhaust gases are properly vented out of the home.
Type: Air Pressure Switch
Size: Compact
Application: High-efficiency gas furnaces, two-stage heating systems, and residential HVAC draft inducer monitoring.
Specifications: 2-Stage Sensing; Set Point 1: 1.81" WC (Water Column); Set Point 2: 0.91" WC (Water Column); Air Proving Functionality.