What is the normal pressure for a car air conditioner?
2 Answers
When the compressor is running at 1500~2000 rpm, the high pressure (discharge pressure) should be around 1.5~2.0 MPa, and the low pressure (suction pressure) should be around 0.15~0.35 MPa. The exact values depend on the specific vehicle's air conditioning system configuration and ambient temperature. Here is some additional information: Air Conditioning System: The car air conditioning system is a device that cools, heats, ventilates, and purifies the air inside the vehicle cabin. Function Introduction: It provides a comfortable environment for passengers, reduces driver fatigue, and improves driving safety. The air conditioning system has become one of the indicators of whether a car is fully equipped with necessary functions.
I usually pay attention to the air conditioning status when driving. The normal pressure for a car's air conditioning system is generally around 25 to 45 PSI on the low-pressure side and 150 to 250 PSI on the high-pressure side. These values can actually be affected by ambient temperature—for example, pressure may be higher on extremely hot days. Last time, my car's vents were blowing hot air, and it turned out to be due to refrigerant leakage causing the pressure to drop too low. So, I recommend checking the pressure gauge at least once a year, especially before summer. Measuring the pressure requires specialized equipment, and you can usually find the high and low-pressure ports by opening the hood. If the pressure is found to be out of range, it could be due to insufficient refrigerant or a compressor malfunction. Never try to tough it out—take it to a professional repair shop immediately, or you risk damaging the entire air conditioning system.
