Air conditioning (AC) systems in cars need to be checked and serviced regularly to ensure that they are functioning properly and efficiently. There are several reasons for this:

1. Refrigerant levels: The refrigerant is the substance that cools the air in the AC system. If there is a leak or the refrigerant level is low, the AC system will not function properly, and it will not cool the air as effectively.

2. Compressor: The compressor is the heart of the AC system, and it pumps the refrigerant through the system. If the compressor is not functioning correctly, it can cause the AC system to malfunction or not work at all.

3. Filters: The filters in the AC system help to remove contaminants from the air before it is cooled and circulated in the car. If the filters are clogged, the AC system may not work as efficiently, and the air quality inside the car can be compromised.

4. Evaporator and condenser: The evaporator and condenser are important components of the AC system. If they are not functioning correctly, the AC system may not cool the air effectively, or it may not work at all.

5. General wear and tear: Like any other component of a car, the AC system can experience general wear and tear over time. Regular maintenance can help to identify and address any issues before they become major problems.

Overall, regular maintenance of the AC system in a car is important to ensure that it is functioning properly and providing cool, clean air for the passengers. If your AC isn't cool anymore we can fix it!