Reasons Why Car Air Conditioning Sometimes Fails to Cool
1 Answers
Car air conditioning may fail to cool due to the following reasons: 1. Insufficient or low refrigerant: When observing from the sight glass on the dryer tank during normal operation, continuous bubbles indicate insufficient refrigerant. If obvious bubble flipping occurs, it signifies severe refrigerant shortage. 2. Excessive refrigerant: Too much refrigerant can also cause cooling failure. The proportion of refrigerant in the air conditioning system must meet specific requirements. An excessive proportion can affect heat dissipation. Similarly, adding too much cooling oil during maintenance can reduce the heat dissipation capacity of the refrigeration system. 3. Loose compressor drive belt: Car refrigeration relies on refrigerant, which is transported by the air conditioning compressor. The drive belt is a crucial moving part that drives the compressor. If the belt is loose, the compressor may slip during operation, reducing transmission efficiency and compressor speed, thereby decreasing refrigerant delivery and resulting in cooling failure. 4. Substandard refrigerant and refrigeration oil: Excessive impurities in the refrigerant and refrigeration oil can clog the car air conditioning filter, leading to cooling failure, increased resistance, and reduced refrigerant flow to the expansion valve, causing insufficient cooling capacity. 5. Moisture infiltration in the refrigeration system: If moisture enters the car air conditioning refrigeration system, it can cause insufficient or no cooling. In such cases, the desiccant or dryer tank in the car air conditioning should be replaced, and the system should be evacuated and recharged with an appropriate amount of new refrigerant.
