What Causes Frosting on the High-Pressure Pipe of a Car's Air Conditioning System?

[MacMia]

The reasons for frosting on the high-pressure pipe of a car's air conditioning system are as follows: Blockage: The filter screen is too dirty or the evaporator inside is too dirty, causing obstruction and hindering ventilation. Indoor: The fan speed of the indoor unit is too slow, leading to poor temperature exchange. Fault: There is damage or leakage in the air conditioning pipeline, resulting in a shortage of Freon. Additional information is as follows: Check whether the connecting pipe is tightly connected: If the connecting pipe was extended during installation, check whether there are sand holes at the welding points. If the length of the connecting pipe was reduced during installation, focus on checking whether the flared port you made meets the standard. Blockage of the capillary tube in the machine: Frosting also occurs on the capillary tube inside the machine, and the current continuously rises from startup until the compressor overheats and shuts down. Releasing the refrigerant and replacing the capillary tube can solve the problem.