Question about Kenmore Freezer 20.3 cu. ft. Frost Free Upright Freezer

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Frost in frostfree freezer

Why is there frost? Is there something I can do to fix the problem? If not, is it safe to use until I can get service?
Thanks

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Make sure your rubber seal around the inside lip of the freezer is clean and sealing properly! this can be the first cause of frost !

Posted on Dec 11, 2008

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How do you make a freezer frost free?


Frost free means that the evaporator coil will not accumulate a thick layer of frost. It will not prevent frost from accumulating on the walls of the freezer. To slow down the amount of frost build up inside the freezer, do not keep the freezer door open for any longer than necessary. The freezer door seal may be defective. This would allow moisture in that would freeze on the inside walls. A heater with timed intervals to come on is one way for a frost free feature. But this will not work for frost build up on the inside walls of the freezer. It would only melt the frost and then it would refreeze again.

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Check rear wall of freezer by feel for frost. Heavy, even frost indicates likely problem in the defrost system. Unplug unit. Defrost heater (in freezer behind rear wall panel), defrost thermostat (same area-must be checked at freezer temperature) or Defrost timer-located lower back outside of unit. Near compressor. Do continuity test on heater and defrost thermostat and if they show continuity (good), replace defrost timer. If not, replace the one that tests bad.

Defrost coils fully. Reassemble.

Please let me know if I have helped with comments and rating.

Refrigerator will work about 7-10 days after being defrosted until thick frost builds up again cutting off air flow to both compartments

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Frost buildup around the inside top of the door of an upright Frigidaire Commerical Frostfree Freezer Mod# FFU20IC8Cw2


This happens when your thermistor gets frozen along with the coils or there is a clogging of the freezer drain which causes Ice to build up and spread to the system. Another issue is that your thermistor may be faulty, telling the system inaccurate temperature. Incorrect freon pressure can also be a cause. I would advise first to have the ice melted by letting the unit stay unplugged and have it cleaned while at it.

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My Bosch frostfree fridge freezer keeps icing up!


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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If its freezing at the back that indicates refrigeration is good. it sounds like you have a thermostat control problem. Replace the thermostat.

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Hi, I had that last year - It was the control board!

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IS IT ICE OR FROST? IF IT IS ICE, THE DOOR MAY HAVE BEEN LEFT CRACKED OPEN.
IF IT IS FROST, IS THIS A FROST FREE FREEZER?
IF YES, IS THE FROST ON THE BACK WALL?
IF YES, THERE IS A DEFROST FAILURE AND YOU WILL NEED TO TROUBLESHOOT THE DEFROST CIRCUIT.
IF THE FROST IS ON THE FOOD OR AROUND THE DOOR OPENING, A SEAL LEAK HAS ALLOWED WARM MOIST AIR INTO THE FREEZER AND CREATED THE FROST. CHECK THE DOOR SEAL FOR A GAP WHEN CLOSED.

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The drain has most likely frozen over. It is at the bottom behind the back panel inside the freezer. You will need to remove all of the ice and run hot water down the drain until it is clear.

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2 Answers

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Three things could be the problem. Most likely would be the defrost thermostat which clips onto the evaporator behind the panel in the freezer. 2nd would be the timer or control board (will have one or the other). 3rd would be a bad defrost heater. Alot of times the def. therm. will show obvious sign of being bad by the cap on top popped open. You can check resistance on the heater. Any resistance at all on the heater means it is good. If it has a standard timer turn it clockwise until it clicks. This is putting it into defrost. If the heater comes on the timer is bad. If it has a control board you would unplug the unit then unplug the power supply to the board and jump line 1 to the wire going to the heater. While unplugged from the board and jumped, plug the freezer back in. If the heater comes on then the board is bad. If you are not sure how to test replace the def. thermostat, which is the cheapest part and see what happens. Note: When conducting the test for the timer or board the def. therm. must be freezing so don't defrost first! Hope this helps.

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