What is the reason for the Lavida's air conditioning not cooling?

[Debra]

Here are the specific reasons and solutions for the Lavida's air conditioning not cooling: Insufficient or low refrigerant: It may be caused by a small refrigerant leak. This can be observed from the sight glass on the dryer tank. During normal operation of the air conditioning, if continuous bubbles are seen in the sight glass, it indicates insufficient refrigerant. If obvious bubble flipping occurs, it indicates a severe shortage of refrigerant. In this case, simply adding refrigerant will solve the problem. Loose drive belt of the car air conditioning compressor: If the drive belt is loose, the compressor will slip during operation, leading to reduced transmission efficiency and a decrease in compressor speed. This results in reduced delivery of compressed refrigerant, causing the car air conditioning to not cool. If the compressor drive belt is too loose, it should be tightened. If it cannot be turned by hand, it means the belt is too tight and should be loosened slightly. If tightening is ineffective, or if the drive belt has cracks, aging, or other damage, a new drive belt should be replaced.