Red Seal Refrigeration and Air Conditioning Mechanic Practice Exam 2025 – Comprehensive All-in-One Guide to Exam Success!

In HVAC systems, a key indicator of a clogged air filter is reduced airflow combined with increased energy consumption. When the air filter accumulates dirt, dust, and debris, it restricts the airflow through the system. This means that the HVAC unit must work harder to circulate the air, leading to higher energy consumption. The reduced airflow can also manifest in inconsistent heating or cooling, making the system less efficient in maintaining comfortable indoor conditions.

Maintaining clean air filters is essential for the system's optimal operation, as a clogged filter can lead to further problems, including overheating components, increased wear and tear, and potential system failures. Regular inspection and replacement of air filters are crucial steps in HVAC maintenance to ensure efficiency and longevity of the system.