What is the fault when the car air conditioner is not cooling?
2 Answers
There are several reasons why a car air conditioner may not be cooling: 1. Lack of refrigerant; 2. Damaged air conditioning flap; 3. Dirty condenser; 4. Damaged air conditioning compressor, throttle valve, or expansion valve; 5. Aged or loose belt; 6. Water in the pipes; 7. Faulty temperature sensor. Steps to check for no cooling: 1. Check the battery voltage; 2. Check the coolant temperature; 3. Check the engine speed; 4. Check the air conditioning system pressure; 5. Check the evaporator temperature; 6. Check the throttle opening; 7. Finally, check the ambient temperature. Reminder to car owners: Avoid covering the air conditioner intake with debris, clean it regularly, periodically check the refrigerant level in the air conditioning system, and also pay attention to the proper use of the car air conditioner and perform regular maintenance.
I've been driving for over a decade, and air conditioning not cooling is a common issue. The most likely cause is insufficient refrigerant - this stuff tends to leak, especially when seals age or connections loosen, resulting in inadequate pressure and no cold air. Compressor failure is more troublesome; if the compressor seizes or breaks down, you'll hear loud noises during operation or it won't run at all, directly affecting the entire system. Clogged cabin air filters are another major problem - excessive dust restricts airflow and reduces cooling efficiency. Electrical issues like blown fuses are very common; check the fuse box near the dashboard and replace the corresponding fuse. Loose or broken belts can also prevent the compressor from turning, so regularly check belt tension. During hot summer driving, AC failure affects safety and increases fatigue - I recommend annual maintenance checks specifically for refrigerant and compressor. If you're not knowledgeable, don't attempt repairs yourself; professional diagnosis at a specialized shop is more reliable.
