Why does the car air conditioner stop cooling after initially working?

[McRichard]

Car air conditioner stops cooling after initially working due to excessive refrigerant. Below are the reasons and solutions for this issue: 1. Excessive refrigerant: Too much refrigerant proportion can affect its heat dissipation, meaning more heat dissipation leads to greater cooling capacity; conversely, less heat dissipation results in smaller cooling capacity. Similarly, adding too much cooling oil during maintenance can also reduce the heat dissipation of the refrigeration system. Solution: Slowly release some refrigerant from the low-pressure side maintenance port of the air conditioning system. 2. Insufficient refrigerant: If there is not enough refrigerant in the air conditioning system, the amount of refrigerant sprayed into the evaporator from the expansion valve will also decrease. Solution: If the refrigerant is insufficient, it should be added. However, note that if adding from the low-pressure side, the refrigerant bottle must not be inverted, and if adding from the high-pressure side, the engine must not be started.