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

[McLeah]

The reasons for frosting on the high-pressure pipe of a car's air conditioning are as follows: Blockage: The filter screen is too dirty or the evaporator inside is too dirty, causing blockage and obstructing ventilation. Indoor Unit: The fan speed of the indoor unit is too slow, leading to poor temperature exchange. Malfunction: There is damage or leakage in the air conditioning pipeline, resulting in a lack of Freon. Solutions are as follows: Check whether the connecting pipe is tightly connected. If the connecting pipe was extended during installation, check for any pinholes at the welding points. If the connecting pipe was shortened during installation, focus on checking whether the flared end you made meets the standards. Caused by Capillary Tube Blockage: Frosting also occurs on the capillary tube inside the machine, and the current rises continuously from startup until the compressor overheats and shuts down. Releasing the refrigerant and replacing the capillary tube can solve the problem.