What are the causes of car air conditioning failure?
2 Answers
Car air conditioning damage can be attributed to the following reasons: Damaged air conditioning flap: The flap motor is generally located in the middle-lower part of the instrument panel and serves as the master switch for air vents. Its failure means the switch is broken. Even if the air conditioning can produce cold air, the airflow can only escape through gaps, which is akin to quenching thirst with poison. Damaged expansion valve and throttle valve: The probability of air conditioning compressor failure is relatively low, so there's no need to worry too much. However, malfunctions in the expansion valve and throttle valve directly lead to poor air conditioning performance. These issues are complex to diagnose and require repair at a professional auto repair shop. Aging or loose belt: The belt is often an overlooked component. Typically, 4S shops will remind you to replace the belt during maintenance. If not replaced, slipping may occur during use, leading to belt breakage, belt noise, loss of power assistance, and poor air conditioning performance.
My car has been used for many years, and air conditioning problems are quite common. Insufficient refrigerant is the most common issue; small leaks in the pipes of older cars gradually reduce the level, requiring a refill and leak check. A broken compressor is a major problem—worn bearings or a faulty clutch can completely cut off the cooling. Evaporators and condensers clogged with dust buildup significantly reduce airflow. Electrical faults like blown fuses or poor relay contact also frequently occur, sometimes causing buttons to stop responding. A dirty air filter that hasn't been replaced for too long reduces airflow and breeds bacteria, affecting health. Check during seasonal transitions, especially in spring when it gets warmer, to test cooling performance and address issues early before summer heat becomes unbearable. Ignoring these small issues can lead to costly repairs. Remember to maintain your car regularly to ensure a comfortable and worry-free drive—don’t skimp on small expenses and invite big trouble.
