A/C Port Pressure Dynamics Understanding High and Low

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. The low pressure side of the A/C is the larger diameter line with the port down beside the lower rad hose above the compressor. The high ... Typically, when the pressures are equal, and the compressor is engaged, then the compressor is bad. That said, those compressors don't usually fail internally ... 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 ... 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. Typical pressures when running are 30-40 on the low and 200-250 on the high side. These pressures will change based on ambient temperature and ... I rented the gauge set at Autozone and compressor off,I had approx. 95 psi on high and low side. Compressor on, low: 45-50 high: 198-200 and ... The high-side charge port is a quick-connect fitting that provides access to the high-pressure side of the A/C system. I have a 2014 Dodge Charger SXT with the 3.6L engine and 8 speed tranny. It's about 5 months old to me and now that summer heat is here ... The compressor initially began pulling the low side down to 30 psi, then began to climb in pressure and would cycle off around 70 psi.