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Does a Car Air Conditioner Not Cooling Mean It Needs Refrigerant?

1 Answers

LaAlan

07/25/25 9:26pm

Not necessarily. Below are the specific reasons and solutions for a car air conditioner not cooling: 1. Insufficient or low refrigerant: This could be due to a minor refrigerant leak. You can observe this through the sight glass on the dryer tank. If there are continuous bubbles in the sight glass while the air conditioner is running, it indicates insufficient refrigerant. If there are obvious bubble flips, it means the refrigerant is severely low. In this case, simply adding refrigerant will solve the issue. 2. Loose compressor drive belt: If the drive belt is loose, the compressor may slip during operation, reducing transmission efficiency and causing the compressor speed to drop. This results in decreased refrigerant compression and delivery, leading to poor 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 slightly loosened. If tightening doesn’t help, or if the belt shows cracks, aging, or other damage, it should be replaced with a new one.

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