This is the Samsung Frost Free Bottom Mount Inverse RL62 model, but I believe any model that uses twin cooling or similar system, and have this problem, you can use this guide.
Step 1: The Problem..
The problem is water condensation inside the refrigerator, accumulating beneath the drawers.
On the next steps, I show the possible solution for resolve this problem. Maybe this is a common issue with Samsung's. In my research, I found this site that have the same problem and my solution is based on the same idea from publisher.
Step 2: Disassemble Inside Panel
Remove the three screws indicated on pictures and use the hair dryer or hot air gun, for melting ice forming behind the panel, be careful for not exceed heat and damage the panel.
Step 3: Remove the Painel
Now with carefully move "slower" the inner panel to drop and release the side latches.
Step 4: Disconnect the Connectors
Now, you can disconnect the two connectors, one of the fan and other of temperature probe. Is very easy, the connector have a clip, you press the clip and pull the connector.
Step 5: Acess to the Heat Exchange
If everything it was all right here, now you will have access to the heat exchanger.
Avoid touch in parts the fins, or pipe connections. From here, handling at the heat exchanger parts, should be done with caution, if damage, case it happens, will have serious problems and will have to call technical assistance.
Step 6: Here Is the Problem
This is a clip from drain evaporator, and it have a problem.
This CLIP DRAIN EVAPORATOR not work correctly, because your hot exchange area is small for the defrost heater coil, and not goes inside the drain pipe. It'll warm a small pool of water once the drain is already frozen. For the keep the drain clear, we let's go make a stem extending from the heat coil to water pipe drain (inside) for heat take. I removed the original clip and i did a alternative with hard electrical conductor (Cu). If do you prefer, here the manufacturer has developed a new clip.
Step 7: Hard Exchange Heater
After making a rod like that of copper, 2.5 mm gauge (4mm would be better) will be install there.
Remember that before install this, you need to unclog the drain hole. You must melt the ice from the frozen evaporator drain. The new clip won’t melt the existing ice but it will prevent the ice from building up again. I used very hot water (my wife’s teakettle) and a small syringe. I put hot water into the drain with the syringe. I let it sit for a minute then removed it with the syringe. I repeated the process and after the third time the drain opened up. I added hot water a fourth time to make sure the drain was opened.
Step 8: Drains Output..
Behind the refrigerator, should remove the panel and will see the two outputs of the drain, one of the refrigerator and one freezer.
The water should come out through the second output (3 Picture).
Step 9: Installed and Finished
I fixed the rods in heater coil with 1mm thick copper wire fixing with 5 on each side like on picture.