What Causes the High-Pressure Pipe of a Car Air Conditioner to Not Heat Up?

[CaydenRose]

Specific reasons why the high-pressure pipe of a car air conditioner does not heat up are as follows: 1. Severe shortage of refrigerant in the air conditioner. 2. Excessive opening of the expansion valve. 3. The compressor is not working or the compressor is flooded. 4. There is a leak in the air conditioning system. 5. Blockage in the air conditioning pipes, etc. More details about car air conditioners are as follows: 1. A car air conditioner mainly consists of a compressor, expansion valve, high-pressure pipes, low-pressure pipes, evaporator, evaporator temperature sensor, and refrigerant. 2. Working principle: Press the AC switch and turn on the blower switch. First, the compressor compresses the refrigerant, turning it into a high-temperature and high-pressure liquid, which then dissipates heat through the air conditioner's cooling plate to become a medium-temperature and low-pressure liquid. It then passes through the expansion valve's throttling to become a low-temperature and low-pressure gas, which is finally blown out by the blower. 3. When the air conditioning system is functioning normally, the high-pressure pipe should be hot, while the low-pressure pipe should be cold.