021-872

This high-quality Air Flow Switch is an essential safety component for HVAC systems, furnaces, and industrial air handling units. Also known as an air pressure switch or air proving switch, this part monitors the differential pressure within the ventilation system to ensure the blower motor is moving sufficient air before allowing the heating cycle to engage. By verifying airflow, it prevents overheating and equipment damage, acting as a critical failsafe for your appliance. If your heating system is failing to ignite or shutting down unexpectedly, this air pressure sensor is a common replacement part to restore safe and efficient operation. Designed for precision and durability, it helps maintain optimal climate control and indoor air quality.
Type: Air Pressure Switch
Size: Compact
Application: Commonly used in residential and commercial HVAC units, furnaces, air handlers, and ventilation systems to prove airflow before system ignition.
Specifications: Differential pressure sensing; safety interlock functionality; diaphragm-actuated mechanical switch.