Why is the car not cooling?

[Robles]

The reasons why the car air conditioning is not cooling are as follows: 1. There is a fault with the refrigerant in the car air conditioning system. 2. Excessive dirt in the car air conditioner's refrigerant and freezing oil causes the filter screen to become clogged, increasing refrigeration resistance and reducing the flow of refrigerant to the expansion valve, leading to the car air conditioner not cooling. 3. There is a dryer in the car air conditioning refrigeration system, whose main function is to absorb moisture in the refrigerant and prevent excessive moisture in the refrigerant from causing a decrease in cooling capacity. When the desiccant in the dryer is saturated, moisture cannot be filtered out. 4. It may be that the compressor's drive belt is too loose, causing the car air conditioner not to cool, or the condenser's heat dissipation capacity has decreased, leading to a reduction in the air conditioning cooling capacity.