Ice builds up on bottom of side by side freezer. can't tell if drain isn't working right or fi there is just to much water from some source--condensation, leak etc

You have two things causing this
1) the water valve for the i/m is seeping and not fully closing,with the i/m removed no water should come from the tube and the valve should be replaced(alos it were the from the im their would be ice build up from that tube all the way down to the very bottom)
2) this is the most prabable cause with the abense of ice build except at the bottom around the lowest drawer and that is the defrost drain is blocked,the drain can be found at the very bottom of the rear panel of the freezer and is blocked so instead of the defrost water draining it is pooling at the bottom then running out all over the floor
to clear the drain push a wire hanger through the tube till a small hole opens then flush it with hot water

The problem with your refrigertor is that the defrost drain is plugged up. After you get the ice buildup out of the freezer section you will have to locate the drain system. It is in the back of the freezer at the very bottom.It needs to be cleaned out. Hope this at least leads you in the right direction.

Unplug the refrigerator.
Remove the food and shelves from the freezer side.
Carefully break up and dispose of the visible ice. There is a drain pan on the lower rear of the freezer. Defrost the ice in this pan with a hair dryer.
Once the ice is out of the pan the drain hole that goes through the bottom of the pan must also be defrosted.
After the drain hole is defrosted pour a mixture of 1/4 cup bleach and 1 and 3/4 cups hot water through the drain hole.

There's a drain hole in the freezer side behind the bottom drawer in the back wall that must be clogh ; put hot water into it untill melted the ice and keep pouring water to clean the drain (don't worry , the water goes to an evaporative tray) .Keep the drain clean by putting every 3/4 months half a cup of clorox or bleach.

check the defrost drain... you can remove the back panel and check the drain if ice over the drain you will need to clear it with HOT water... let me know fi it helps

clear ice and with hot water pour into the drain hole till open and drains ,, take back panel of freezer out and wrap a piece of thick cooper wire around the heater and drop into the drain hold about 1in and it will keep drain open / thanks

Your defrost drain tube is clogged up. Remove the ice and look for the top of a drain tube about 3/8-1/2" in diameter. Once the ice is gone, use a meat baster (turkey baster) full off hot water stuck in the top of the drain tube and blast hot water through to clean it out. Do this several times with about 4 cups of hot water so you don't over flow the drain pan and flood the floor

remove back panel inside freezer. you will see drain tray at bottom with a drain hole in the middle - this is blocked usually with ice. melt off with a hairdryer and follow up with hot water till water flows away freely

sounds like you have a clogged defrost drain tube. removing back panel of freezer will give you acess to drain trough, melt away the ice with a hair dryer, youll find a drain hole under there somwhere,pouring boiling water down the drain will clear it pretty quickly( i use a steam machine purchased from the infomercials works awesome, after you clear it and all water drain down tube wrap a piece of solid copper wirearound the heater( black calrod heater right above the drain trough) and stick it in the whole maybe an inch or so. now everythime the heater comes on to defrost it will prevent the hole from freezing over

Sounds llik a defrost heater is open if you
have a VOM you can test it for continuity
Its probably behind a panel in the rear bottom
of the refrilgerator Should have a pan under
there to