The lack of cooling in a car air conditioner is usually caused by multiple factors. The most common one is insufficient refrigerant or refrigerant leakage. The aging of seals after long-term use may lead to slow leakage, and the system pressure needs to be checked with a pressure gauge (the normal range is 2-3 bar on the low-pressure side and 15-20 bar on the high-pressure side). If the pressure is insufficient, the leakage point must be repaired before refilling with the appropriate refrigerant for the vehicle model (such as R134a or R1234yf). Another common issue is a clogged cabin air filter. It is best to replace it every 10,000 kilometres. Severe dust accumulation will restrict airflow, and replacement (costing approximately tens of ringgit) can significantly improve performance. Compressor malfunctions (including electromagnetic clutch failure or internal wear) require professional diagnosis and repair. To extend compressor life, avoid prolonged operation at maximum cooling settings while idling. More complex problems like expansion valve blockage or evaporator icing require specialized diagnostic equipment and should be addressed by certified repair shops. For routine maintenance, regular condenser cleaning and filter replacement can prevent approximately 80% of AC system failures. Persistent issues may require inspection of belt tension, desiccant condition, and potential moisture intrusion into the system, with repair costs typically ranging from 300 to 500 ringgit.
