Clients ac has been out for 2 years. Out door unit would not come on. Found that the limit switch was open. Checked charge and there was no pressure system takes 6.8 pounds. Added proper amount of refrigerant.. Have a 18 degree temperature split. System is operating at this point. Replaced contactor since it was sparking when it came on. Will come back tomorrow and add dye to system, Will return 08/25/2020 10 am for dye inspection