773-154

This premium replacement Lennox air pressure switch is a vital safety component for residential gas furnaces and HVAC systems. Designed as an air proving switch, it functions by monitoring the pressure differential generated by the draft inducer blower. By ensuring that combustion gases are being properly vented, this switch allows the heating cycle to safely proceed. With a precise factory-set trip point of 0.20" WC (Water Column), it is engineered to detect venting blockages or inducer motor failures, preventing hazardous operation. If your furnace is experiencing ignition failure or intermittent shut-offs, replacing the pressure switch can restore reliable performance and ensure your home's heating system meets essential safety standards.
Type: Air Pressure Switch
Size: Compact
Application: Residential gas furnaces, HVAC heating systems, and draft induction monitoring.
Specifications: Set Point: 0.20" WC; Function: Air Proving and Draft Verification; Application: Sensing negative pressure in furnace combustion chambers.