Why are both high and low pressure pipes of car air conditioning hot?
2 Answers
Car air conditioning high and low pressure pipes are both hot because the expansion valve is blocked, and the air conditioning is not working. The following is a related introduction to car air conditioning: Introduction to car air conditioning: Car air conditioning is an important comfort feature in a car, which can provide both cooling and heating. When the air conditioning is cooling, the AC button needs to be pressed, at which point the compressor clutch engages, allowing the engine to drive the compressor. The compressor then continuously compresses the refrigerant and delivers it to the evaporator. Components of car air conditioning: Generally include cooling devices, heating devices, and ventilation devices. This combined system makes full use of the limited space inside the car, with a simple structure and easy operation, making it a popular modern car air conditioning system internationally.
When both the high and low pressure pipes of my car's air conditioning system are hot while driving, I get quite worried. Normally, one pipe should be cool and the other hot because the high pressure pipe releases heat after refrigerant compression, while the low pressure pipe absorbs heat for cooling. Both being hot indicates a system malfunction. Possible causes include insufficient refrigerant preventing proper heat absorption circulation, a blocked expansion valve causing refrigerant flow stagnation, compressor failure unable to compress refrigerant, or poor heat dissipation from fans/condenser leading to heat buildup. This severely impacts AC cooling performance - driving without AC in summer is unbearable and increases engine load/fuel consumption. I recommend addressing it promptly by visiting a repair shop for professional diagnostics to identify the exact issue. Early repairs save money and ensure safety.
