Why is the A6L air conditioning not cooling?

[McSavannah]

The following are the reasons why the A6L air conditioning is not cooling: 1. Reason one: Refrigeration cycle leakage; refrigerant has not been replenished regularly. The solution is to use a leak detector to check for leaks, repair them, and replenish the refrigerant. 2. Reason two: Expansion valve or low-pressure pipeline blockage, liquid storage tank or dryer or high-pressure pipeline blockage, expansion valve pressure bubble leakage, needle valve completely closed. The solution is to clean or replace related components and the liquid storage tank or dryer. If the pressure bubble leaks, replace the expansion valve. 3. Reason three: Excessive refrigerant filling. The solution is to discharge excess refrigerant to meet the pressure standard. 4. Reason four: Air mixed into the refrigeration cycle (insufficient vacuum or air entering during filling). The solution is to re-vacuum and refill. If the above symptoms persist, replace the liquid storage tank or dryer and compressor oil. 5. Reason five: Expansion valve failure (needle valve opening too wide); expansion valve pressure bubble disconnected from the evaporator. The solution is to check and reconnect the pressure bubble or replace the expansion valve.