Changing your car’s air filter can indirectly make the air conditioning (AC) feel colder, but it’s not a direct fix for AC performance. Here’s how it works:

1. Improved Airflow: A dirty or clogged air filter can restrict airflow into the cabin. When airflow is restricted, the AC system might struggle to push enough cool air through, making it feel less effective. Replacing the air filter allows for better airflow, which can help the AC distribute cool air more efficiently.
2. Reduced Strain on the AC System: When the air filter is clean, the AC system doesn’t have to work as hard to cool the air. This can lead to more consistent cooling and potentially make the air feel colder because the system is operating at peak efficiency.
3. Enhanced Air Quality: A clean air filter ensures that the air entering the cabin is free from dust and pollutants, which can make the air feel fresher and more comfortable, contributing to a perception of cooler air.

However, if the AC isn’t blowing cold air due to issues like low refrigerant, a malfunctioning compressor, or other mechanical problems, changing the air filter alone won’t solve the problem. In such cases, it’s best to have the AC system inspected by a professional.

The filtration capability of a car air filter typically ranges between 5 to 40 microns, depending on the type and quality of the filter. High-quality air filters, such as those made of synthetic materials, may filter out particles as small as 5 to 10 microns, while standard paper filters usually capture particles around 20 to 40 microns.

For reference:

• 5 microns: Pollen, dust, and some types of mold spores
• 20-40 microns: Larger dust particles, dirt, and debris

The exact micron rating can vary based on the manufacturer and the intended use of the filter. High-performance filters designed for environments with a lot of dust or pollution might offer finer filtration.