What Causes the High-Pressure Pipe of a Car's Air Conditioning to Become Hot to the Touch?

[Cali]

High temperature in the high-pressure pipe is a typical symptom of excessive refrigerant in the system. It is recommended to check the pressure on the high-pressure side and appropriately reduce the system pressure. Below are relevant details: Compressor: The compressor acts like a high-pressure pump, pressurizing the refrigerant and sending it to the condenser. The refrigerant is cooled in the condenser to near room temperature and then drastically cooled by the throttling device. Finally, the low-temperature refrigerant absorbs heat in the evaporator to achieve cooling. Components: The operating principle of a car's air conditioning is the same as that of a household air conditioner. The system mainly consists of four major components: the compressor, condenser, throttling device, and evaporator.