Springtime Air Conditioning Repair for a residential customer near The Villas at Craig Ranch. Upon arrival found system running but not cooling. Checked inside unit and found a slight ice build up after txv. Everything else checked out good. Checked outdoor unit and found pressures low, when I went to take off caps on pressure ports noticed high side was leaking out pretty good. Tried to tighten down valve stem but stem was still leaking. Changed out valve stem and port stopped leaking. Also added 6lbs to system to set charge. Only charged for three pounds because of recent maintenance visit. System is now cooling with a 55* supply and a 74* return.