Why is the air conditioning not cooling at idle speed?

1 Answers
Colton
07/30/25 4:18am
When the air conditioning is not cooling at idle speed, it is usually because the expansion valve is damaged, preventing the formation of high pressure in the system before the expansion valve. As a result, the high-pressure refrigerant cannot reach the required pressure of 150 kPa, leading to the evaporator behind the expansion valve failing to cool down, which causes the air conditioning to not cool properly. Another possible reason is internal wear in the air conditioning compressor, which prevents the pressure between the compressor and the expansion valve from reaching the required range of 150 kPa to 200 kPa, resulting in insufficient cooling. The car air conditioning system is an air conditioning device installed in vehicles, capable of cooling, heating, ventilating, and purifying the air inside the cabin. It provides a comfortable environment for passengers, reduces driver fatigue, and enhances driving safety.
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