773-014

The Lennox Pressure Switch (-1.00" WC) is a vital safety component for residential gas furnaces and HVAC systems. Also known as an air-proving switch, this part monitors the negative pressure created by the draft inducer motor to ensure proper venting before the heating cycle begins. It acts as a fail-safe, preventing the furnace from igniting if it detects a blockage or a failure in the exhaust system. If your heating system is experiencing ignition issues or signaling a pressure fault, replacing the air pressure sensor can restore reliable operation. This high-quality component is designed for precise vacuum detection, ensuring your home stays warm and safe throughout the winter.
Type: Air Pressure Switch
Size: Compact
Application: Gas furnace safety circuits, draft inducer motor monitoring, and residential HVAC system maintenance.
Specifications: Pressure Rating: -1.00" WC (Water Column); Function: Air proving and safety shut-off; Type: Negative pressure sensing.