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

[GabrielleAnn]

The reason for low low pressure and high high pressure in the air conditioning system is poor circulation in the system, blockage in the dryer filter; kinks in the connecting pipes; the shut-off valve not being fully open; or the four-way valve not switching properly. Below are specific details about car air conditioning pressure: 1. Under normal conditions: When the compressor operates at 1500-2000 rpm, the high pressure is around 1.5-2.0 MPa, while the low pressure is around 0.15-0.35 MPa. 2. High ambient temperature around the vehicle: The high pressure may reach around 2.5-2.8 MPa, but it generally does not exceed 3.1 MPa, otherwise it will trigger pressure protection. To ensure the safe operation of the air conditioning compressor, most vehicle air conditioning systems are equipped with a pressure protection switch. When the air conditioning system pressure is too high or too low, the pressure switch will be triggered, stopping the air conditioning compressor.