diagnostic car tool represented by the color red

The best way to Operate a Manifold Gauge Set 1Locate the low- and high-side service ports and get rid of their protective caps. Assure that the manifold hand shut-off valves are closed ahead of proceeding, by turning them clockwise /a>.

2Connect the hose that corresponds towards the low-side gauge, represented by the color blue, towards the low-side port on the method.3Connect the high-side hose, represented by the color red, towards the high-side port of your system.4Turn on the system and set all air conditioner controls to their maximum settings.5Slowly open the manifold valve for the low-side gauge and permit the gauge reading to stabilize.

6Open the valve for the high-side gauge within the same style. An average reading for the low-side gauge would be in between 20 to 30 pounds per square inch (psig). On the high side , the average reading will be among 160 to 220 psig. These readings correspond roughly with a discharge air temperature of between 40 to 50 degrees Fahrenheit. Refrigerant might be added by means of the yellow line if pressures are low.