There are many reasons why car air conditioning may not cool properly. Below is an introduction to the common causes of car air conditioning not cooling: 1. Insufficient or too little refrigerant. A common reason for car air conditioning not cooling is insufficient or too little refrigerant, which is likely caused by minor leaks. 2. Excessive refrigerant. The proportion of refrigerant in the air conditioning system must meet specific requirements. If the proportion is too high, it can affect heat dissipation. Similarly, adding too much cooling oil during maintenance can also reduce the heat dissipation of the refrigeration system. 3. Loose drive belt of the car air conditioning compressor. Car cooling relies on refrigerant, and refrigerant transmission depends on the air conditioning compressor. The drive belt is a crucial moving part that drives the compressor. If the belt is loose, the compressor may slip during operation, leading to reduced transmission efficiency, lower compressor speed, and decreased refrigerant delivery, resulting in the air conditioning not cooling. 4. Substandard refrigerant or frozen oil. Excessive impurities in the refrigerant or frozen oil can clog the car air conditioning filter, causing the air conditioning to stop cooling. This increases resistance and reduces the flow of refrigerant to the expansion valve, leading to insufficient cooling capacity. 5. Moisture infiltration in the refrigeration system. If moisture enters the car air conditioning refrigeration system, causing insufficient or no cooling, the desiccant or dryer in the car air conditioning system should be replaced. At the same time, the system should be evacuated and refilled with an appropriate amount of new refrigerant.
