Question about Sub-Zero Bottom Freezer Refrigerator

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My drain tube is freezing at least once a month, what is the real answer ? model 550 21years old

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Hi,


When the drain tube is freezing up ,the problem is probably the drain in the evaporator drain pan has ice built-up or frozen. To properly repair the refrigerator the drain pan will need to be defrosted. If you would like to defrost the drain pan yourself follow the instructions below. The instructions might not fit your refrigerator but they will work for most top mount freezers.

If you are just accumulating water underneath the crispers it might be from high humidity. In humid weather when the refrigerator door is opened the warm humid air will cause the walls of the refrigerator to sweat and run down to the bottom. If you are getting water dripping from the top of the refrigerator liner the drain might be stopped up in the freezer and the water is overflowing and running through the insulation to the refrigerator liner. If this is the case and you would like to repair it yourself follow these instructions.

Disconnect the power from the refrigerator and remove the food from the freezer. Remove the sliding freezer bottom. If you have an icemaker, remove it. There are 2 screws above the ice mold of the icemaker, remove them. Pull the icemaker away from the side wall of the freezer and disconnect the wires. Remove the icemaker. Remove the screws that hold the rear panel in the freezer and remove the panel. You now have access to the evaporator coil and the drain pan underneath it.

Defrost the ice from the evaporator drain pan with a hair dryer. Don't use a sharp object to remove any frost or ice from the evaporator coil. The evaporator coil is made of aluminum and is easily punctured. When the drain pan is defrosted and water runs through it pour 1/2 cup very hot water through the drain to clean it.

Your heating element (black bar) is working or you wouldn't be getting the water. If you could get a piece of copper wire(solid) about the dia. of a pencil lead and wrap it around the heater 3 or 4 times and let it hang in the defrost water hole , it may keep it from freezing .



Please accept the solution if it's helpful. Do get back to us for any further query.


Posted on Oct 05, 2010

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Most models have a metal drip collector below the evaporator that has a drain hole in it where the defrosted water goes into before it goes down to the drip trap and then out the drain hose. If the area around the drain hole has cracks, or was punctured during servicing, the drain water can get underneath the tray and run out beside and around the drip tray and never gets into the drain tube and freeze in that location. A careful inspection of this area will reveal any issues.

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I have a Kenmore Coldspot Model #69207990 and have the same problem. Water from the freezer drains into the refridgerator onto the shelves and sheets of ice form. A repairman pointed out that the tube leading down from the freezer onto the drain pan was frozen. By pouring hot water down the tube, he reopened this drain line. Problem solved for six months and the drain line froze again. My question is how to stop this drain line from freezing up again.

Dec 16, 2010 | Kenmore 20.6 cu. ft. Top Freezer...

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Water from defrosting leaks into the bottom of the freezer and freezes into a solid sheet of ice, which I chip out every 1 to 2 weeks. Kenmore bottom freezer refrigerator Model 795.65002400.


Hello,

If water leaks inside your refrigerator
(and it WILL, at some point) you can fix
it yourself.

In the good old models, one had to defrost the
fridge every few months manually.

In the recent models, the fridge defrosts automatically,
once or twice a day, and the water is supposed to drain
down a long drain tube into a pan located at the bottom of
the fridge. This collected water in the pan evaporates
by the heat under the fridge.

Now the drain tube can get clogged, by food debris and/or
ice. Thus when the water cannot drip through the drain tube
the water drips inside the fridge.

The drain tube is located behind the fridge, which is pretty
easy to take it out and clean. However usually the clog is
not in the long tube but in the connector assembly located
in the backside of the fridge that leads to the long drain tube.

To get to the connector assemble, you need to unscrew and
take out the back panel of the freezer compartment. You would
see the evaporator coil and a tray under the coil where the water
is supposed to drip through. If you find the tray completely frozen
with ice, let it melt off. To speed up melting, you may blow
hot air via a hair dryer. Once the ice is clear, you should see
a drain hole in the middle of the tray. This could be clogged,
which needs to be unclogged.

Next unscrew and open the thermostat control assembly located
in the inside of the back of the refrigerator compartment just above
the light bulb fixture. Once you take the take the cover off (you will
also have to take the knobs out) you will see a small tray cup about
2" x 2" x 1/2" into which water from the top freezer compartment
drain hole is supposed to drain. Pull out the tray cup, and if clogged,
unclog it, clean it and put it back.

To check if the drain works ok, pour some water on the tray
under the evaporator coil (top freezer compartment) and see if it
immediately drains into the tray located at the bottom of the fridge
at the floor level. If it does, you got it; and you can assemble things
back in the reverse order you took the pieces apart.

Needless to say, use a vacuum cleaner with a long suction tube to clean
out all the collected mess under the fridge. No matter how good
your housekeeping is, the bottom of the fridge will be full of dust.

Good luck and hope this helps

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HOT POINT FRIDGE - FREEZER DRIPS WATER


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 back of the freezer.

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I have a lg fridge/freezer model grb218juda. The freezer is at the bottom and a thick layer of ice keeps forming which i have to scrape away monthly. the seal is not worn and this appliance is 3 years old


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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 lower back of the freezer.
Take a bare copper wire and wrap it around a fin near the heater and put the other end a few inches down the drain. The heat convection may prevent it from freezing.

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1 Answer

Water collects in the bottom of the freezer and freezes. I totally shut down the refrigerator for 24 hours and it is ok for 2-3 months when the same thing happens.


The defrost drain hole is plugged.
The drain is located in the back of the freezer at the bottom of the drain trough.
Remove the back panel if you are handy.
Or call a service tech.
After dethawing the the ice covering the defrost drain
poor hot water down the drain hole and wait a few minutes for the ice to melt in the drain tube.
If after 10min. the water does not drain or is real slow
you use a shop vac. to clear the debris from the drain line or air compressor to blow it out.
If the unit freezes up again call for service.
The defrost heater is proabally out of spec. or the drain heater(If the unit has one) is defective.

Hopefully this helps
Mike

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