Why is the car air conditioning not cooling effectively?

1 Answers
StRhett
07/29/25 1:30am
Here are the specific reasons and solutions for poor cooling performance of car air conditioning: 1. Insufficient or low refrigerant: This may be caused by minor refrigerant leakage. You can observe through the sight glass on the dryer tank. During normal operation of the air conditioning, if there are continuous slow bubbles in the sight glass, it indicates insufficient refrigerant. If obvious bubble flipping occurs, it indicates severe refrigerant shortage. In this case, simply adding refrigerant will solve the problem. 2. Loose drive belt of the car air conditioning compressor: If the drive belt is loose, the compressor will slip during operation, causing reduced transmission efficiency and decreased compressor speed. This results in reduced delivery of compressed refrigerant, leading to ineffective cooling. If the compressor drive belt is too loose, it should be tightened. If it cannot be turned by hand, the belt is too tight and should be loosened slightly. If tightening is ineffective, or if the belt shows cracks, aging, or other damage, a new drive belt should be replaced.
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