Air Flow and Air Proving Switches
An HVAC air flow switch and an air proving switch are the same part. They act as both a sensor and a control device, detecting the presence or absence of airflow in HVAC systems. These switches monitor airflow within the system and then trigger responses like fan activation, operation shutdown, or alarm signals. HVAC air flow switches are often critical for compliance with safety codes and standards....Read more
Air flow and air proving switches commonly work with blower motors, fans, duct systems, and safety controls in residential and commercial systems like furnaces, air handling units (AHUs), rooftop units (RTUs) and ventilation systems. HVAC air flow switches are essential to system efficiency, air quality, and equipment longevity. They’re also necessary safety features, as they verify airflow in a system before triggering heating or cooling cycles. This means they prevent operation if airflow is insufficient, which protects the system from overheating and damaging other sensitive components.
Air flow switches and air proving switches experience dust buildup, standard wear, and sensor drift over time, though they rarely require frequent replacement. If your HVAC system is having airflow-related issues, it’s always good to inspect the air flow switch for damage and verify its detection accuracy. LONG PartsPros stocks OEM air flow switches designed for durability in high-temperature or high-humid environments. Buy online today enjoy same day shipping on most parts!