Air Conditioning Repair Certification (ETI) Practice Exam

A clogged air filter in an air conditioning system can significantly reduce airflow, which in turn affects the system's overall efficiency. When the air filter becomes blocked with dust, dirt, and debris, it restricts the volume of air that can pass through the system. This reduced airflow can lead to various issues, including the system having to work harder to push air through, which can increase energy consumption as a result. Over time, this can lead to decreased cooling capacity, uneven temperature distribution in the space being cooled, and potential damage to components like the blower motor due to overheating.

While a clogged air filter can indeed lead to increased energy consumption and might contribute to excessive noise depending on certain conditions, the most direct and immediate effect is the reduction in airflow and efficiency. Prioritizing the replacement or cleaning of air filters is essential for ensuring optimal performance of air conditioning systems.