How do I charge my AC with gauges?
Open valve on the refrigerant source. Open the low side valve on the manifold gauge set. Charge system until gauges read over 50 pounds of pressure. Close low side valve on the manifold gauge set.
What does the Red side of the a / C gauge mean?
The red, high side gauge is used to measure the high pressure side of the a/c system. This gauge has no markings that indicate vacuum. It reads positive pressure only.
How to test AC pressure with a manifold gauge?
How to test AC pressures with a manifold gauge. 1, Set the AC controls to MAX and RECIRCULATE 2. Blower set to HIGH speed 3. Close the doors. Windows can be open. 4. Once you attach your gauges and start your engine, keep RPMs steady at around 1,200 to 1,500 RPM. Refer to this chart for AC pressure gauge diagnosis. What the AC gauge pressures mean
Why does my AC pressure gauge not equalize?
1) You haven’t waited long enough for the pressures to equalize, or 2) The orifice tube, expansion valve, compressor reed valves or stuck or there’s a severe restriction somewhere in the system that’s preventing the pressure from equalizing. In that case, you must fix that problem first. Troubleshooting incorrect static pressures
What do the numbers on the high and low side gauges mean?
Like the color of the hose, the gauges and control knobs will usually be colored to indicate high or low pressure. What are all the numbers on the high and low side gauge? The low side pressure gauge is called a compound gauge. That means it can be used to measure pressure or vacuum.
The red, high side gauge is used to measure the high pressure side of the a/c system. This gauge has no markings that indicate vacuum. It reads positive pressure only.
How do you read the AC manifold gauges?
From there, start your engine and run the AC system. Place your temperature control dials at their maximum setting until the vehicle is cool. After accomplishing the above steps, you can begin reading AC manifold gauges from the manifold set. Open the values and check the dials on the low and pressure sides.
1) You haven’t waited long enough for the pressures to equalize, or 2) The orifice tube, expansion valve, compressor reed valves or stuck or there’s a severe restriction somewhere in the system that’s preventing the pressure from equalizing. In that case, you must fix that problem first. Troubleshooting incorrect static pressures
Like the color of the hose, the gauges and control knobs will usually be colored to indicate high or low pressure. What are all the numbers on the high and low side gauge? The low side pressure gauge is called a compound gauge. That means it can be used to measure pressure or vacuum.