Coils in HVAC (Heating, Ventilation, and Air Conditioning) systems can become dirty over time due to the accumulation of dust, dirt, and other debris. This can cause reduced airflow, decreased efficiency, and even system failure if left untreated.

Before cleaning a dirty coil, you may notice a decrease in system performance, such as reduced cooling or heating capacity, longer run times, higher energy bills, and poor indoor air quality. You may also notice visible dirt or debris on the coil surface or around the air filter.

After cleaning the dirty coil, you should notice improved system performance and efficiency. The airflow should increase, and the system should be able to reach the desired temperature more quickly and efficiently. This can lead to lower energy bills and improved indoor air quality. Additionally, cleaning the coil can help prevent future system failure and extend the lifespan of the HVAC system.