Question about Sub-Zero Refrigerators

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Sub Zero model 550 bottom Freezer/ Refrigerator. The freezer section keeps freezing up and the drain off water runs down the inside across the rail frezing the door shut. No matter how many times we defrost this etc it seemes to just freeze right back up.

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  • clarkk Aug 18, 2008

    No the drain was not plugged water ran through easily. Within a week water was freezing that was running down the inside across the rail.



    There is a small piece of metal that appaers to run off a heater coil down into the drain hole. Should this be in the drain hole?



    More suggestions?

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Clarkk I have seen this many times. Your drain is clogged. If you pull the drawers out and pull the top cover you will see the evap. On the cover you will find a nozzle that goes to the drain. Use some compressed air and blow out the drain. In some cases there will be some silicone that will need replaced. You can get a food grade silcone sealant at a hardware store. Hope this helps.

Posted on Aug 10, 2008

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My Subzero 550 did this: The right side of the freezer has a drain that was plugged with ice. When the freezer defrosts the water runs down the inside of the box and onto the drawer rails, where it then freezes. The drain tube is normally kept ice free by an aluminum strap wrapped around the copper defrost tube in the freezer heat exchanger, which runs down into the drain tube. Over time the copper defrost tube gets some surface corrosion and the aluminum strap doesn't get warm enough during the defrost cycle to melt ice in the tube. If you can get it apart, you can clean up the tub surface with steel wool, or buy the electric defroster for the drain tube to replace the aluminum strap.

Posted on Oct 21, 2008

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