Not knowing the source of the faulty A/C an estimate for repair would be difficult. It might be You may have a leak in the line, (check all the high side and low side caps). You may have a malfunctioned compressor and/or compressor clutch. I suggest you have a repair shop inject dye into the system, that can be found with a black light to better hone in on the breach in the system.
〉 Answered on Apr 1st, 2009 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions