First of all thank you so much for your donation. Here's the problem you can't tell how much charge is in the system by what pressure you have. Pressure is only used for diagnostics purposes to trouble shoot problem's or to see that the system pressure is good and within spec's. The only way to tell if the system has the correct amount of charge is to get a a/c recover machine which cost's a couple of thousand and recover the charge. Then you would pull a nice long vacuum on the system to help remove water from the system. Then you watch the gauge's for 5 min's to see if you had a leak by seeing if the system was loosing vacuum. Then the machine would charge the system by weight it has a built in scale. Unless your system is totally empty you used the right amount of can's then you would know it was full to the proper level.
Thursday, August 5th, 2010 AT 2:58 PM