773-069

The Carrier Pressure Modulating Switch Assembly is a critical safety and performance component designed for high-efficiency modulating gas furnaces. This air proving switch monitors the pressure differential generated by the inducer motor, ensuring that the venting system is clear and providing the necessary airflow for safe combustion. If the system detects a vent blockage or a failure in the draft inducer, this assembly will interrupt the ignition sequence to prevent hazardous operation. Featuring three distinct pressure set points, this assembly is engineered to handle the varying operational stages of a modulating furnace. It is a vital replacement part for resolving furnace ignition lockouts, frequent cycling issues, or pressure switch error codes in residential HVAC systems.
Type: Air Pressure Switch
Size: Standard HVAC Component
Application: High-efficiency modulating gas furnaces and residential heating systems
Specifications: Triple-stage pressure modulating assembly with trip points at 1.79" WC, 0.91" WC, and 0.45" WC