What are the reasons for the lack of cooling in the air conditioning of an old Volkswagen Sagitar?
1 Answers
The reasons for the lack of cooling in the air conditioning of an old Volkswagen Sagitar are as follows: Insufficient or low refrigerant: This is a common cause of car air conditioning not cooling properly, likely due to minor refrigerant leakage. The solution is to observe through the sight glass on the dryer tank. When the air conditioning is running normally, if there are continuous slow bubbles in the sight glass, it indicates insufficient refrigerant. If obvious bubble flipping occurs, it means the refrigerant is severely insufficient. Refrigerant should be added, but note that if adding from the low-pressure side, the refrigerant bottle must not be inverted. If adding from the high-pressure side, the engine must not be started. 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 properly. If the compressor drive belt is too loose, it should be tightened. If it cannot be turned by hand, it indicates the belt is too tight and should be loosened slightly. If tightening is ineffective or the belt shows cracks, aging, or other damage, a new drive belt should be replaced.
