Unveiling the Secrets of A/C High and Low Pressure Ports

The low side port sits right in front of the passenger's side strut tower. It's easily accessible, unlike the high pressure port which is tucked in closer to ... Learn the 4 main conditions that will cause your vehicle's A/C pressure to have low side pressure that is high and high side pressure that ... As noted, you need some real gages. I suspect your high reading is while the compressor is cycled off, in which case high side and low side will ... The R-134a and R-1234yf pressure charts are for guidance when using A/C Pro® recharge products and gauges. ... Standard Low Side Pressure Range PSI, Standard High ... The high pressure port on the hard lines is smaller than the low pressure port on the drier. I have an R134 gauge set, which seems to fit the low pressure port ... LOW, LOW, Add Refrigerant. ; LOW, HIGH, Need service, possible blockage of the expansion valve or orifice tube. ; HIGH, LOW, Needs service, possibly faulty ... Low side should be around 20-30. If your high and low pressures are always equal with the pump running, your expansion valve/orifice tube is likely bad. The high side of the system is the smaller of the two. And on a 134a system the low side port is the bigger of the two. Hope this helps. A. Thus, if the gauge is reading high, then it indicates a problem with your compressor in that the low side isn't going low. When the A/C is fully ... So I found out my AC was BADLY leaking out of the high pressure port and the O-ring for the low pressure switch was in bad shape when I pulled ...