What Causes Frost on the Air Conditioning High-Pressure Pipe?

[DelEverly]

Reasons for frost on the air conditioning high-pressure pipe: 1. The filter screen is too dirty or the evaporator inside is too dirty, causing blockage and obstructing ventilation. 2. The indoor unit fan speed is too slow, leading to poor heat exchange. 3. The air conditioning pipeline is damaged or leaking, resulting in insufficient Freon. Here is more information about the high-pressure pipe: 1. During the cooling process, the small pipe is the high-pressure pipe, while the large pipe is the low-pressure pipe. 2. During the heating process, the small pipe is the low-pressure pipe and the large pipe is the high-pressure pipe, which is the opposite of the above. 3. The condenser in the high-pressure circuit and the defrost circuit generally use iron pipes, while the low-pressure end mostly uses copper pipes.