What Are the Causes of Car Air Conditioning Not Cooling?
1 Answers
Car air conditioning not cooling can be caused by insufficient refrigerant, dirty condenser, damaged air conditioning compressor, throttle valve or expansion valve, aging or loose belt, or water in the pipeline. Here are specific methods to diagnose the causes of car air conditioning not cooling: 1. Insufficient refrigerant. Refrigerant loss is mainly due to leakage. If the car's air conditioning performance deteriorates after adding refrigerant for a period of time, it indicates a condenser leak, and the condenser needs to be replaced. Adding fluorescent dye to the refrigerant and inspecting with special glasses can reveal the leak point. In severe cases, oil stains can be observed on the condenser surface through the grille, indicating a leak. 2. Dirty condenser. If the air conditioning performance is poor in summer, but the system checks show no issues and the high and low pressures are normal, cleaning the radiator and condenser is necessary. Pollen or debris clogging the condenser can cause engine overheating or poor air conditioning performance. 3. Damaged air conditioning compressor, throttle valve, or expansion valve. The probability of compressor failure is relatively low. 4. Aging belt. An aging belt may slip during operation, leading to belt breakage, noise, loss of power assistance, or poor air conditioning performance. 5. Water in the pipeline. The car air conditioning system includes a dryer tank, which absorbs moisture from the refrigerant to prevent excessive moisture from reducing cooling capacity. When the desiccant in the dryer tank is saturated, moisture can no longer be filtered out. When the refrigerant passes through the expansion valve orifice, its pressure and temperature drop, causing freezing. This obstructs refrigerant flow, increases resistance, or completely blocks circulation, resulting in the air conditioning not cooling.
