773-087

This premium 2-stage air pressure switch is a vital safety component for high-efficiency residential furnaces. Designed to serve as an air proving sensor, it monitors the pressure created by the draft inducer motor to ensure proper venting and exhaust flow before the heating cycle begins. This dual-stage switch is specifically calibrated for multi-stage heating systems, featuring precise set points of -0.35" WC and -0.60" WC to manage low and high-fire operations. Replacing a faulty pressure switch can resolve common furnace issues such as ignition failure, intermittent short cycling, or system safety lockouts. Engineered for durability and high-performance sensing, this switch helps maintain the safe and efficient operation of your HVAC equipment by preventing the furnace from firing under unsafe venting conditions.
Type: HVAC Air Pressure Switch
Size: Standard
Application: Two-stage gas furnaces, residential forced-air heating systems, and high-efficiency HVAC units requiring dual-stage air proving safety controls.
Specifications: 2-Stage functionality; Low-fire actuation: -0.35 inches Water Column (WC); High-fire actuation: -0.60 inches Water Column (WC); Type: Air Proving/Differential Pressure.