What should AC pressure gauges read?
What are normal AC gauge pressures when the system is running? Generally speaking, you want around 27-psi on the low side and 200 on the high side.
How do I check my AC pressure?
Restart your vehicle and make sure the AC is on the highest setting. Watch the gauge on the refrigerant hose and check to see if your pressure is under 40 psi. If it is, your system is under-charged. You want the reading as close to 40 psi as possible.
