773-342

Ensure the safe and efficient operation of your heating system with this premium Lennox Pressure Switch. Designed for use in commercial unit heaters and residential furnaces, this air-proving sensor acts as a vital safety mechanism by monitoring the draft inducer motor's airflow. It is calibrated to a 0.22" WC (Water Column) set point, ensuring that combustion gases are correctly exhausted before the ignition sequence is allowed to proceed. If your HVAC system is experiencing ignition lockout or failing to start, a malfunctioning pressure switch is a common culprit. This replacement part provides the precision and reliability needed to restore proper venting cycles and protect your equipment from unsafe operating conditions.
Type: Air Pressure Switch
Size: Compact
Application: Used in gas-fired unit heaters, forced-air furnaces, and commercial HVAC venting systems to verify proper inducer motor operation and venting safety.
Specifications: Pressure Rating: 0.22" WC (Water Column), Component Type: Air Proving Switch