121-488

This premium Air Baffle and Air Proving Pressure Switch is a critical safety component designed for high-efficiency HVAC systems and furnaces. As a vital part of the appliance's ignition sequence, this sensor monitors the pressure differential created by the inducer fan to ensure proper airflow and venting. By verifying that exhaust gases are being safely moved through the heat exchanger, it acts as a fail-safe that permits the gas valve to open only under optimal conditions. If your heating system is experiencing ignition failure, intermittent cycling, or pressure switch lockout codes, this replacement part is essential for restoring safe and reliable operation. Engineered for durability and precise calibration, it helps maintain the efficiency of your heating and cooling equipment while protecting the system from improper venting hazards.
Type: Air Pressure Switch / Air Proving Switch
Size: Small
Application: Commonly used in residential and commercial furnaces, rooftop units (RTUs), and HVAC heating systems to verify inducer motor airflow and vent pressure.
Specifications: Safety-interlock pressure sensor, monitors airflow differential, corrosion-resistant housing, standard terminal connections.