Posts Tagged: normal AC pressure gauge reading

Normal AC pressure gauge readings

Normal AC pressure gauge readings What are normal AC pressure gauge readings? The gauge images below show normal AC pressure gauge readings for an operational auto AC system. Note that the pressures on the gauges correlate to the ambient temperature at the vehicle. The normal pressures are based on the engine running at 1,500 RPM and the AC turned on with compressor running.   Generally speaking, you want around 27-psi on the low side and 200 on the high side. Why 27-psi on the low side? Because, on an R-134a … Read More