What would be an appropriate immediate action if an HVAC technician detects improper airflow?

Detecting improper airflow in an HVAC system is a critical issue that can affect the system's efficiency and performance. The immediate action of inspecting the ductwork for leaks is essential because leaks can significantly impact airflow. If the ductwork has leaks, conditioned air can escape before it reaches its intended destinations, resulting in uneven temperatures, increased energy consumption, and discomfort for occupants.

By inspecting the ductwork, the technician can identify and address any gaps or damages that may be hindering airflow. This step can help restore proper airflow, improve system efficiency, and ensure that the HVAC system functions as intended. Addressing ductwork issues is often a priority because it can lead to a range of other problems if not corrected promptly.

In contrast, resetting the thermostat may not address the underlying issue of airflow, and while changing the air filter is important for maintenance, it wouldn't be the immediate fix for airflow issues if underlying problems like duct leaks exist. Checking refrigerant levels, while also important, is typically more relevant in assessing cooling performance rather than airflow concerns directly. Hence, focusing on ductwork first is the most logical and effective step in this scenario.