Yup, Condenser.
You can fix it BUT, you need to put a dehydrating level vacuum on it (a refrigeration vacuum pump is needed) to remove the moisture and then recharge it with the correct amount of refrigerant and oil. You also need to leak test it to make sure no other components are leaking. It really isn't DIY if you want it done right. Most people don't have the proper equipment like vacuum pumps andleak testers.
Removing the moisture is important. Any moisture in the system will quickly corrode the compressor and destroy the condenser. Water and r134a combine under heat and pressure to form hydroflouric acid. BAD. The acid will do a number on the components. There is a dessicant (water absorber) in the system, but since the system is exposed to atmosphere, it has probably absorbed all the water it can. The vacuum process will remove the water.
