Arrived to perform previously diagnosed repairs. Had the evaporator coil dropped off upon arrival. Heated up the existing brazes and removed the refrigerant lines from the evaporator. Replaced the coil with a new one. Dry fit the refrigerant lines. Ran nitrogen while brazing in the new refrigerant lines and filter drier. Pressure tested the system. Found a leak on the back side of one of the brazes. Fixed this leak and found another. Repaired the second leak. Pressure tested and soap and bubbles all brazed connections. Connected the vacuum pump and pulled the system into a vacuum. Brought the system down to spec and disconnected the vacuum pump and dropped the charge in the system. Ran the air conditioning system for a while to allow pressures to equalize. Calibrated the systems charge to factory specifications. Air conditioning system is functioning properly at this time.