Because I failed to clean the back end of the refrig regularly like I used to and it was leaking some water, I chose to get my repair guy to fix it. Prior I did try to thaw the freezer but that didn't help. I did ask a question or two but afterwards realized I had more questions I forgot to ask so here goes.....
I saw the repairman remove from behind the refrig (GE side by side), a heavy plastic tube which he cleaned out (I assume this connected to a drain hole inside the bottom of the freezer) while the 2nd repairman used a C02 cartridge gun to blow thru this drain hole to help unclog it. At that point I think they then put back the tube and sprayed some strong alcohol solution on the refrig coil (???) and said that would clean the coil. Closed up the back of the refrig and said that's it.
I wonder if I can, in the future, pour some bleach and water down this drain hole without hurting the heavy plastic tube? Years ago on other refrigs, I never did this but rather just vacuumed the back end where the guts were. Don't recall any water leaking then. Advice?
(BTW, the repairman apparently got it right because it no longer leaks any water)