Below is an estimate for a warranty, evaporator core replacement without refrigerant. It also includes refrigerant. I added 19 pounds of refrigerant back into the system. System is on and cooling properly at this time with a 20° temperature differential. In the process I removed the faulty evaporator coil. The system was completely void of refrigerant. I installed the new evaporator coil and placed the system on a vacuum down to under 500 µm. I charged the refrigerant back into the system and let it run and then tested pressures and temperatures.