Hi , I have a GE PDS20SBRBRSS and water is leaking out the bottom. There is also an ice layer forming in the freezer (which is at the bottom). I think this is a clogged drain pipe. I'd like to access the drain pipe to confirm and fix, but I cannot determine where to get access to the pipe. Is this on the outside of the unit, or on the inside? Do I need to disassemble anything to get to the pipe? Any help would be greatly appreciated! Thanks!