What is the appropriate air conditioning pressure for a sedan?
2 Answers
Automobile air conditioning normal high pressure should be 1.3-1.7MPa; normal low pressure should be between 0.15-0.25MPa. The following is relevant extended content: Introduction to automobile air conditioning systems: The automobile air conditioning system is a device that cools, heats, ventilates and purifies the air inside the compartment. It can provide passengers with a comfortable riding environment, reduce driver fatigue and improve driving safety. Air conditioning equipment has become one of the indicators to measure whether a car is fully functional. Optimal air conditioning temperature: The air conditioning temperature is not the lower the better. The most comfortable temperature for human body is about 23 degrees Celsius. On sunny summer afternoons, the air conditioning should not be set too low. This can both resist the summer sunshine and ensure that the ambient temperature around the human body is not too low, thereby preventing "air conditioning disease". It also responds to the national call for energy conservation, emission reduction, low carbon and environmental protection.
After years of driving, I've found that the air conditioning pressure in sedans is quite crucial. Generally, the low-pressure side should be between 25 to 45 PSI, and the high-pressure side between 150 to 250 PSI is ideal. This depends on the type of refrigerant, such as R134a, which is commonly used in most cars nowadays. During hot summer weather, the low pressure might rise to around 40, which is within the normal range, so no need to worry. I remember once when the AC wasn't cooling properly, a check revealed that the high pressure was too low. Adding a bit of refrigerant fixed the issue. Incorrect pressure can cause the compressor to wear out quickly, leading to expensive repairs. I recommend checking the system with a pressure gauge before each summer to ensure the car remains comfortable.
