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What Are the Reasons for a Car Air Conditioner Not Cooling?

1 Answers

LaAbel

07/29/25 4:54pm

Reasons for a car air conditioner not cooling: 1. Insufficient or low refrigerant: A common reason for a car air conditioner not cooling is insufficient or low refrigerant, which is likely caused by minor leaks. 2. Excessive refrigerant: Too much refrigerant can also cause the air conditioner to not cool. There is a required proportion of refrigerant volume in the air conditioning system. If the proportion is too high, it can affect heat dissipation. Similarly, adding too much cooling oil during maintenance can also reduce the heat dissipation of the cooling system. 3. Loose drive belt of the car air conditioner compressor: Car cooling relies on refrigerant, and refrigerant transmission depends on the air conditioner compressor, with the drive belt being a crucial moving part that drives the compressor. If the drive belt is loose, the compressor may slip during operation, leading to reduced transmission efficiency, lower compressor speed, decreased refrigerant delivery, and ultimately causing the car air conditioner to not cool. If the compressor drive belt is too loose, it should be tightened. 4. Substandard refrigerant and freezing oil: Excessive impurities in the refrigerant and freezing oil can clog the car air conditioner's filter, causing the air conditioner to not cool, increasing resistance, and reducing the flow of refrigerant to the expansion valve, resulting in insufficient cooling capacity. 5. Moisture intrusion into the cooling system: If moisture enters the car air conditioner's cooling system, it can cause insufficient cooling or no cooling at all. If this is the case, the desiccant or drying tank in the car air conditioner should be replaced, and the system should be evacuated and refilled with an appropriate amount of new refrigerant.

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