What is the reason for the car air conditioner cooling at idle but not cooling when accelerating?
2 Answers
The reasons for the car air conditioner cooling at idle but not cooling when accelerating are as follows: 1. Ice blockage in the pipeline: There is ice blockage in the air conditioning pipeline, but it is not completely blocked. At idle, the refrigerant can flow, so it cools; when accelerating, the refrigerant flow is not smooth, so the cooling effect deteriorates. 2. Compressor damage: At idle, the refrigerant can flow and cool; when accelerating, the suction force of the compressor weakens, so it cannot cool. The car air conditioning system, referred to as car air conditioning, is used to adjust and control the temperature, humidity, air cleanliness, and air flow inside the car cabin to the optimal state, providing a comfortable riding environment for passengers and reducing travel fatigue; it creates good working conditions for the driver and plays an important role in ensuring safe driving. It generally includes a refrigeration device, a heating device, and a ventilation device.
I've seen many cars with this issue. The air conditioning cools normally at idle, but stops cooling when accelerating. The main reason could be that the AC compressor belt is too loose. When engine speed increases, the belt slips and spins, preventing the compressor from operating properly and interrupting the cooling cycle. Additionally, insufficient refrigerant is another common factor: it might barely work at idle, but system failure occurs at high RPM due to significant pressure fluctuations. The compressor clutch may also disengage under high load. I recommend first checking the belt tension for any cracks or signs of looseness; then test whether the refrigerant pressure is low. Ignoring it could lead to compressor burnout or more serious failures, so it's best to have it checked at a repair shop promptly. Regular maintenance should include attention to the belt replacement schedule to prevent problems caused by aging.
