Question about Kenmore 13.7 cu. ft. / 388 liter Upright Freezer 23424

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Ice forming on pipes in back of freezer

LOng insulated pipe on back of freezer douwn to moter at bottom iced over defrosted and 2 days later small amount of ice noted turned off again what could be the problem we have it set on three it is the 13.7 upright kenmore

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

Posted on Dec 31, 2008

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Could you fit a trace heater inside the drain tube to keep the ice from forming? Or extend the dripdown time after defrost cycle so the water doesn't accumulate? If the tech thinks the insulation has blown, it may be time to bite the bullet and replace the fridge.

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dependant on appliance you may have a small drain hose at the base of the appliance that drains the defrosted water away at regular intervals. Sometimes this blocks and the water that should drain away just starts to freeze over.

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I have the same model + problem. You should not need to defrost this model manually if it's working correctly, but the ice build up you describe is probably due to a blocked pipe in the auto-defrost system at the back. You need to defrost properly to prevent recurrence.

Behind the upper freezer drawer there's an aluminium tray behind a plastic grille. Every few days this tray warms up to melt any accumulated ice behind this plastic grille (full height of the freezer). A pipe should take the meltwater down to a plastic tray below (pipe + plastic tray are visible if you take the lower panel off the back). Your problem is too much ice blocking that pipe: the heater can't cope and it doesn't melt, so the ice 'cascades' down the back behind the bottom drawer.

When you manually defrost, you must ensure that this pipe is clear, otherwise the auto-defrost won't work, and you may have to defrost manually again within days.

I have found that the best way to defrost the pipe is to remove the lower back panel, disconnect the corrugated flexible plastic pipe from the stub that comes from the bottom of the freezer, + pump steam into the stub (gently) using a hand-held steamer (with tube + nozzle). You don't have to empty the freezer or move your food as the door stays closed, and no steam gets into the freezer until the pipe is unblocked. Be sure to unplug the freezer before taking the back off! [There is a fan in this area that could start up without warning]

Check how much of the pipe is blocked by gentle probing with a pencil: the aluminium tray is about 105mm above the bottom of the stub. This measurement is important…

When the pipe is clear, there may still be too much ice in the aluminium tray above (not sure how much is 'too much') if you only created a narrow 'chimney' though the block of ice (likely to get blocked again). You need to widen that chimney by melting more of the ice in the aluminium tray. I use a simple steam nozzle made from an old-fashioned Bic pen with a couple of 1mm holes drilled just below the coloured bung at the end. This directs steam onto the walls of the 'chimney' rather than upwards.

There's no point steaming the walls of the plastic 'stub' pipe, so only use the home-made nozzle when your probe reaches 105mm (i.e. when you have melted all the ice in the plastic stub tube but before your 'chimney' has broken through the block of ice in the aluminium tray). If you judge this right, you'll melt almost all of the ice under a still-frozen top surface: no steam will get into the freezer and your food will stay frozen. With a probe it will be clear when you've broken through the top surface of the ice. When you have done so, it's time to look inside the freezer to see how well you have cleared the aluminium tray.

It's perfectly feasible to get all this done in 30 minutes.

Don't forget to replace the corrugated plastic pipe + valve at the bottom. It stops humid air from going into the freezer and icing up in exactly the area we've just been defrosting.

Take a lot of care with steam jets as they can burn you badly. You should check a first aid website so you know what to do BEFORE it happens.

Some of these tips may be helpful: (1) run the freezer at -18 degrees (the 'warmest' setting) so it's not working so hard. (2) Leave a big gap (>100mm) between the back of the freezer and the wall. (3) Clean the matrix of delicate tubes to the left of the fan whilst you have the back off [a small bottle brush is ideal; remove the fan for better access]. (4) Put something between the middle of the freezer and the wall to prevent the warm air that's being blown out behind the fridge from being sucked into the air intake behind the freezer (there is a baffle built in underneath, but nothing behind. (5) Mount the fan on spacers (with longer screws) so that it's closer to the heat exchanger… this means that a larger area of grille can act as an air intake. (6) Raise the unit off the floor a little to free up the air intake path beneath the freezer.

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Switch off fridge. Put a pedistal fan in front blowing into the cabinet and leave until all ice has defrosted. Locate the drain hole in the back of the freezer compartment, try to defrost ice which blockes up about the first inch or two of this pipe. If water does not run through you need to force it through with a turkey baster. This should sort your problem. ratemeplease

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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

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My Bosch Frost Free Fridge Freezer did the same thing - Ice forming in the bottom of the freezer area after a few days.

It was caused by a blocked drain pipe - When the freezer does the de-frosting cycle, the melted ice drips into a tray and tehn runs into a dish on top of teh compressor, through a pipe.

If this pipe gets blocked, the de frosted ice overflows from the tray and overflows into the bottom of the freezer and then re-freezes !

To fix, pull the freezer away form the wall, locate the pipe that runs to the dish on top of the compressor and blow through it - This should clear it. Alternatively, from inside the freezer compartment, pull off the cover at the back, but the clips holding it on will probably break off, as mine did ! You can sort of push the cover back on and re-fit the food draws.

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it sound like your unit has a bad sensor on it or a leak. you should never have to add refrigerant to a unit unless theres a leak then it has to be repaired firdt the recharged.

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Defrost it and see if you have lost the insulation aroundthe pipe. If you have you can use expanding spray fome insulation on it. like you use on your house.

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The freezer defrosts every day. the puddle is from that. It is supposed to go into a pan at the bottom and evaporate. You need to look at the pan and determine if it has a hole or the drain hose is leaking somewhere.

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