Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

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Large ice block is forming behind the fruit drawer.

There is a large amount of ice forming behind the fruit drawer. It seems to be originating from a flexible pipe located along the back. As the ice melts it tends to from a puddle on the floor.

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  • DicksonMR Apr 17, 2009

    same problem, but after putting heater wire into drain tube and replacing evaporator, testing sensors, and seting unit at recommended 0 / 38 degree settings, still get Ice forming in the drain tray that eventually overflows off the drain tray into the refrig behind the fruit/veggie drawers. Refrig tested and replaced twice after evaporator was installed, compressor, everything testing out fine. Seems to me if there was a way to "heat" the entire drain tray during cycle off periods, problem would be solved

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I assume you have a model 650 or 550. Your drain line has clogged then frozen. You need to defrost the ice then clear the drain line. I usually knock a majority of ice away then defrost the rest. Once you have defrosted the line you need to clear it. I use high pressure nitrogen to blow them out, but a turkey baster will do just fine. Fill the turkey baster with water, disconnect the drain line from the drain trough. While holding the baster into the drain line squeeze the bulb to force the water into the line. It may take a couple of tries. Reconnect the drain to the drain trough and you should be all set. If you let this go too long the insulation may be saturated and you will have to have a tech install a drain tube heater kit. If you have questions call the factory at 800-222-7820 or go online to the locator page: http://subzero.com/locator/locator.aspx?type=0&zip=Zip%20Code

Posted on Feb 22, 2009

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