Why did the Buick car's air conditioning suddenly stop cooling?

[MacMatthew]

The reasons why the Buick car's air conditioning suddenly stops cooling are: 1. Lack of refrigerant; 2. Damaged air conditioning flap; 3. Loose drive belt of the car's air conditioning compressor; 4. Blocked air filter and filter screen; 5. Water infiltration into the refrigeration system. The solutions for the car's air conditioning suddenly stopping cooling are: 1. Add refrigerant; 2. Replace the air conditioning flap; 3. Clean the air filter and filter screen. The functions of the air conditioning: 1. Filter the air entering the cabin; 2. Adsorb moisture in the air; 3. Keep the air clean and prevent bacterial growth; 4. Prevent glass fogging; 5. Adjust the temperature of the cabin.