Question about Sub-Zero Bottom Freezer Refrigerator

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I have a sub-zero fridge/freezer model #550. I inherited this unit when I recently purchased my home. The problem I have is that water dripds in the freezer area on the right hand side opposite from the ice maker. If I defrost the freezer and let it sit with the power off and the door open for about 5 hours the problem is solved for about a month. Then it starts to leak again. I have used silicone to seal the edge wher it comes in bu only puts a bandaid on the problem. Any suggestions.

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The evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes. The melted frost drips into a drain pan and through a drain tube to the drain tray under the freezer/refrigerator where it's evaporated by the condenser fan.


Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the inside of the freezer at the bottom of the rear cover.

Posted on Apr 04, 2011

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