How do I stop the freeze up of the drain hole on my kenmore upright freezer my

SOURCE: ICE BUILDUP ON BOTTOM OF FREEZER, DRAIN HOLE FROZEN

There is normally a small filiament of metal which is attached to the defrost element and conducts heat down the drainpipe preventing ice build up. You can pour some boiling water onto this area and even wriggle a piece of plastic tubing down the drain pipe to dislodge any blockage. For future prevention, you can attach a piece of copper wire around the defrost element (in the absence of the original filiament) and extend it down the drainpiple

SOURCE: kenmore freezer

Try cleaning out the drain opening with a pipe cleaner. Or use a turkey baster and force hot water into the drain. Rinse with a mild bleach solution to kill any mold. Another solution is to unplug the unit and let it sit for a couple of days to defrost completely. Sometimes during the humid summer the system just gets over burdened and doesn't defrost completely. This gets progressivly worse until you get this problem.

SOURCE: kenmore upright freezer

You should check the drain hose inside underneath the freezer.This is done at the back down below. Mine was looped too high and water could not get out. I took the loop off that was holding the hose and now water can drain away without freezing. You can pour warm water down the drain hole to melt the ice in the tube if you remove the grate covering it inside the freezer. I have read that several Kenmore upright freezer
owners have the same problem. I was astonished that this was the problem and I had put up with it for too long, defrosting the freezer every 2-3 months!.Give it a try!

SOURCE: Ice forming on pipes in back of freezer

you could have a freon leak allowing the pipes to freeze up