Will my AC work better if I change the filter?

Replacing the air conditioning filter usually significantly improves AC performance, mainly reflected in three aspects: air purification, enhanced airflow, and improved temperature regulation efficiency. In contrast, new filters can block pollutants such as pollen and bacteria, making the air fresher-particularly beneficial for allergy sufferers. Additionally, unobstructed airflow reduces the load on the air conditioning system, shortens cooling or heating time, and indirectly improves fuel efficiency. Note that if the expected improvement isn't achieved after replacement, possible causes include poor filter quality, improper installation, or other AC system malfunctions. Regular replacement every 15,000 to 20,000 kilometres or annually is recommended, with more frequent changes advisable during rainy seasons or periods of heavy haze for optimal performance.