Pulled a dumb one yesterday. AC system was functioning, but only blowing cool air. Bought a recharge can with hose, hooked to low side but the system would not take much product out of the can. I could see the pressure change on the guage every time the compressor cycled. It was suggested by someone to relieve some pressure from the valve and try again, so I did from both valves. I did not realize that the high side valve was designed differently than the low side. I pushed a small screw driver in there and damaged the high side valve. I can see how the low side valve can be removed, but how do you replace the high side valve? Do you have to remove the whole hose assembly and go at it from the back side or is that not a serviceable item? Do I have to replace the entire hose/valve assembly? Its hot down here right now and I need to get this thing fixed asap, thanks in advance for any help.