A/C Pressure Port Demystified High vs Low Pressure Explained

Some older posts by p_gill indicate 35-40 psi on the low side and 150-155 psi on the high side, but no reference back to a spec. Due to factors beyond the control of RB The Mechanic, it cannot guarantee against unauthorized modifications of this information. When the compressor is running, the suction side looses some pressure and the high pressure side gains some pressure. This is what pushes the ... Asking because we at the shop charge through the high side port, but it takes way longer and sometimes the machine can't even pump it well ... 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 ... 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 ... The high and low side pressure equalize when the A/C system is shut of and sat or when the compressor isnt working period. My best guess would be the Valve ... My A/C is not cooling well so bought one of those do-it-yourself Freon kits and have it attached to the low pressure port. When the A/C is ... I was trying to find the low pressure port this afternoon. If I have located the current port, it is just right of the high pressure port (If ... 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 ...