How to Determine When to Replace the Air Conditioning Filter
3 Answers
Methods to determine whether the air conditioning filter needs replacement are as follows: 1. Recommended replacement interval for the air conditioning filter: 10,000 kilometers. The air conditioning filter should be replaced regularly. When there is an odor when using the air conditioning or a large amount of dust blows out from the vents, it's time for cleaning, maintenance, and replacement. 2. Several situations that indicate the need for filter replacement: If the airflow from the air conditioning significantly decreases, the air conditioning filter may be clogged. First, clean the filter, or replace it if necessary. In cities with poor air quality, it is recommended that car owners replace the air conditioning filter twice a year to ensure their health.
When you feel the air conditioning airflow becoming weaker while driving, or notice a musty or dusty smell, it's likely a sign that the cabin air filter needs replacement. I've experienced similar issues before—significantly reduced airflow and even poor cooling performance. Just open the air filter housing to inspect it. If the filter surface is covered with dust, leaves, or grime, replace it immediately. Don’t neglect regular checks—it’s generally recommended to replace the filter every six months or around 10,000 kilometers, especially after prolonged driving in dusty areas. Delaying replacement can degrade cabin air quality, affect respiratory health, and even overload the AC system, shortening its lifespan. So, take action as soon as you notice any abnormalities.
I find the easiest method is to pay attention to changes in the car's odor. If you notice an unpleasant smell—like dust or mildew—as soon as you turn on the AC, it's definitely time to replace the filter. Another telltale sign is airflow: if the air blowing out feels noticeably weaker or reduced, it means the filter is clogged. Checking it yourself is simple—just locate the filter, open the cover, and inspect whether it's blackened or filled with debris. Don’t wait until the AC stops working completely; this affects cabin comfort and is especially unfriendly to allergy-prone individuals. I make it a habit to check every six months—keeping the air fresh is always a good idea.
