60 to 80 pounds
To read gauges,you must know which is low side/high side,if you know that, then depending on which freon you are using,you read the pressures matching the temp,for example,looking at the low side gauge(blue gauge) look at R-22 freon,you will see that 40 degrees,will equal to 70 psi
how do you check freon on central ac and what should the guages read.
Usually the gauge in on the dashboard with all the other gauges. That way you can read it while driving.
using a can of the proper type of Freon, connect a gauge and the Freon to the low side ac port. With the engine and ac running, open the valve and allow the Freon to flow until the gauge shows full. Read the directions on the can and be mindful of the can, as the out side of it gets cold enough for your hand to stick to it.
It is necessary to read the density and the quality of the gauge. You should see the lower side.
Usually around 220.
If the outside temperature gauge is not reading the right temperature on a Buick Regal, perhaps it has become damaged. It can also not read the right temperature if it is wet or covered with dirt or snow.
Aroun the middle of the gauge, 195-210
13.9 to 14.2 volts.
with a set of freon guages. The smaller copper pipe should be warm to hot. The larger copper pipe should be cold and in hot humid weather dripping water from condensation. what should the guages read.
first read up on it then read the gauge... theres a cool new kit called "A/C recharging for dummies" at the parts store.. also Everyone should have a manual for their vehicle, and the library should have a professional shop manual available, for FREE, in the reference section(make copies of the correct sections) read up and fix it like a PRO! :) good luck-Dave
normally the gauge should be in the middle.(between hot and cold) that is concider operating temp.