773-016

This high-quality replacement pressure switch is designed for Lennox gas furnaces and HVAC heating systems. As a critical air proving component, it monitors the negative pressure created by the draft inducer motor to ensure proper venting of exhaust gases before ignition. Operating at a set point of -0.95" WC (Water Column), this vacuum switch acts as a vital safety lockout, preventing the furnace from operating if it detects inadequate airflow, a failing inducer motor, or a blocked vent. If your heating system is experiencing startup failures or intermittent shut-offs, replacing the air pressure switch can restore safe and efficient operation. Engineered for durability and precision, this switch ensures your HVAC system maintains optimal combustion and indoor air safety.
Type: Air Pressure Switch
Size: Standard
Application: Used in residential gas furnaces and HVAC units to prove airflow and ensure combustion safety.
Specifications: Pressure Setting: -0.95" WC (Water Column); Sensing Type: Negative Pressure/Vacuum; Application: Air Proving and Safety Cut-off.