What are the reasons and solutions for car air conditioning not cooling?
2 Answers
Reasons and solutions for car air conditioning not cooling: 1. Insufficient or too little refrigerant: A common reason for car air conditioning not cooling is insufficient or too little refrigerant, which may be caused by minor leaks. The solution is to add refrigerant. However, note that if adding from the low-pressure side, do not invert the refrigerant bottle, and if adding from the high-pressure side, do not start the engine. 2. Too much refrigerant: The proportion of refrigerant in the air conditioning system has specific requirements. 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 system. The solution is to slowly release some refrigerant from the low-pressure side maintenance port. 3. Loose drive belt of the car air conditioning compressor: Car cooling 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, lowering compressor speed, and decreasing refrigerant delivery, leading to the air conditioning not cooling. The solution is to replace the drive belt with a new one. 4. Substandard refrigerant and cooling oil: Excessive impurities in the refrigerant and cooling oil can clog the air conditioning filter, causing the air conditioning not to cool. This increases resistance and reduces the flow of refrigerant to the expansion valve, resulting in insufficient cooling. The solution is to use qualified refrigerant for repairs, as it plays a critical role in car air conditioning. 5. Moisture infiltration in the refrigeration system: If moisture enters the car air conditioning refrigeration system, it can cause insufficient or no cooling. The solution is to replace the desiccant or dryer in the car air conditioning, and then evacuate the system and refill it with the appropriate amount of new refrigerant.
Oh, I also get a headache when my car's air conditioning isn't cooling. The most common reasons are refrigerant leakage or compressor failure. In summer, the car gets extremely hot, and if there's insufficient refrigerant, the heat absorption effect is poor. The solution is quite simple: first, check if the air conditioning pump compressor is making any unusual noises—if it's loud, it might be broken. If there's a refrigerant leak, you'll need to go to a professional shop to have it refilled. For regular maintenance, make sure to clean the air conditioning filter and condenser periodically, as too much dust can affect cooling. Also, a malfunctioning temperature controller can cause the air conditioning to stop cooling—I had this issue last time, and it was fixed with a small expense to replace it. Remember to open the windows temporarily for ventilation to avoid heatstroke while driving.
