The function of the air conditioning filter is to filter the outside air, ensuring that the air inside the car is fresh and odorless.

The function of air conditioning filters
1. Ensure that unfiltered air enters the cabin as little as possible.
2. Filter solid impurities such as dust and grinding particles from the air.
3. Absorb harmful substances and moisture in the air.
4. Ensure that the air in the driver's cabin is clean and does not breed bacteria, which can effectively intercept pollen and ensure the safety of passengers while driving.

Problems that may occur if the air conditioning filter is not replaced
The function of the air conditioning filter is to filter the air. After long-term use, the air volume that can be filtered by the air conditioning filter decreases, and at this time, the air blown out of the air conditioning system outlet weakens; In addition, in humid environments, the air conditioning filter is prone to mold and bacterial growth, resulting in a moldy or foul odor when using the air conditioning. In addition, there may be activated carbon in the air conditioning filter element, and after long-term use, the adsorption and filtration function of activated carbon will also be reduced.

Therefore, for the air conditioning filter, it needs to be replaced regularly, usually once a year.
The consequences of using substandard and inferior air conditioning filters
Poor quality air conditioning filters are difficult to filter out impurities due to their rough workmanship and low material quality. The paper used for inferior air conditioning filters is of poor quality and prone to mold growth. Like the air filter, the air conditioning filter is usually located in the passenger glove box inside the carriage, making it easy to disassemble and requiring careful inspection.
In addition, some car manufacturers do not install air conditioning filters, but they all have installation spaces that can be purchased and installed by oneself.