HVAC Experts Guide High Pressure vs. Low Pressure Port Diagnostics

3 Symptoms Of A Bad AC Pressure Switch [HIGH OR LOW]. Mechanic Base ... GM Air Conditioning Pressure Switch Problem and Replacement!! High side typically is about 200-250 PSI on a warm to hot day. Low side should be a minimum of 35-40 PSI and locked clutch on the compressor. No cycling. A/C pressure switches are installed in the high pressure side of the system, between the compressor and the receiver/drier. The objective is to ... Which also requires bumper cover removal. My low pressure side read 40ish psi on a 70 degree day with Compressor running and air blowing ... I found one port, I assume is the low pressure port about 1 foot from the left end of the radiator. ... I switched to A/C and the air got warmer ( ... Between 125 and 185psi on the high side 35psi to 55psi on the low side. Hold close manifold gauge to check for psi loss while running compressor a/c. Low pressure is on the drier which is under the car by the front right wheel. You will have to remove the fender liner and maybe the wheel to ... the low pressure port is the one near the dryer. the high pressure is the port near the compressor. According to the parts diagram, the low pressure port is in the liquid line, over by the SBEC. It shows the high pressure line on the ... The compressor creates high pressure by compressing the low pressure vapor from the evaporator so that the high pressure vapor can release heat at the condenser ...