What Causes a Car's Air Conditioner to Blow Air But Not Cool?

[Robles]

Here are the specific reasons and solutions for a car's air conditioner blowing air but not cooling: 1. Insufficient or low refrigerant: This may be caused by a minor refrigerant leak. You can observe this through the sight glass on the dryer tank. When the air conditioner is operating normally, continuous bubbles in the sight glass indicate insufficient refrigerant. If there are obvious bubble flips, it indicates a severe refrigerant shortage. In this case, simply adding refrigerant will resolve the issue. 2. Loose compressor drive belt in the car's air conditioner: If the drive belt is loose, the compressor may slip during operation, reducing transmission efficiency and causing the compressor speed to drop. This decreases the delivery of compressed refrigerant, leading to the air conditioner not 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 work, or if the drive belt shows signs of cracking or aging, it should be replaced with a new one.