773-356

This Lennox pressure switch is a critical safety component designed for high-efficiency HVAC systems and gas furnaces. As a dual-port air proving switch, it monitors the pressure differential created by the draft inducer motor, ensuring proper airflow is established before allowing the ignition process to begin. Operating at a factory-set 0.55" WC (Water Column), this SPST (Single Pole Single Throw) switch helps maintain optimal furnace performance and prevents the buildup of dangerous combustion gases. Ideal for furnace repair and routine maintenance, this reliable replacement part ensures your heating system operates safely and efficiently.
Type: Air Pressure Switch
Size: Compact
Application: Gas furnaces and residential HVAC heating systems
Specifications: 0.55" WC (Water Column) Set Point, Dual Port Configuration, SPST (Single Pole Single Throw) Switch Logic