What Causes High Low Pressure and Normal High Pressure in Car Air Conditioning?

[AaliyahRose]

When the car air conditioning exhibits low low pressure and normal high pressure, it is highly likely due to a malfunction or damage in the air conditioning expansion valve. Solution: The solution for high low pressure and normal high pressure in car air conditioning is quite simple. Just remove the air conditioning expansion valve and check if it is functioning properly. If it is indeed faulty or damaged, simply replace it. More details are as follows: 1. Note: Since the expansion valve of the car air conditioning system is located on the firewall side of the vehicle, it is quite inconvenient to remove. Additionally, temporary recovery of the air conditioning refrigerant is required, which involves a significant amount of work. Therefore, it is recommended to go to a 4S shop for this task, as attempting to do it yourself may be counterproductive. 2. Normal working pressures of air conditioning high and low pressure: Under normal conditions, when the compressor is running at 1500-2000 rpm, the high pressure should be around 1.5-2.0 MPa, and the low pressure should be around 0.15-0.35 MPa.