Is it acceptable to only evacuate the low-pressure side of a car's air conditioning system?
1 Answers
No, it is not acceptable. Below is relevant information: Evacuation: Evacuation refers to the process of removing air from the car's air conditioning pipelines, while also extracting water vapor from the pipelines. This is because the refrigerant in the air conditioning system is highly sensitive to moisture. If there is air or water in the pipelines, the air conditioning system may fail to cool or provide insufficient cooling, affecting the comfort of passengers during summer. Therefore, to ensure the system operates correctly, evacuation must be performed before adding refrigerant. Purpose of evacuation: The evacuation of a car's air conditioning system aims to remove environmental moisture-laden air that enters the system when it is opened for maintenance. If refrigerant is already present in the system, evacuation is not necessary when topping up. In the absence of a vacuum pump, a portion of refrigerant gas can be added from the high-pressure side, and then released from the low-pressure side until a slight cooling sensation is felt.