Why does freezer have frost build up? - KitchenAid KBFA25ER Bottom Freezer French Door Refrigerator

Either way if you had the doors opened a lot, it should like you probably have frost build up preventing proper air flow. You'd need to pull everything out of the freezer and remove the lower back panel inside the freezer. If there is frost build up, you'll need to use a hair dryer to thaw all the frost out. The unit will continue to beep until the set temperature (0 and 38) are reached so that could take a while even after thawing out all the frost build up.

If removing panels sounds like more than you can handle, you can always unplug the unit for 24 hours and leave the doors open to allow the unit to defrost on it's own.

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.

It could be the freezer is over-stocked and air cannot circulate but often it signals an excess of water vapour is getting into the freezer from overuse or a faulty or misaligned door seal or from unwise use of the freezer.
Frost build up in one part of a freezer could also mean a part of the insulation is failing.

Hi,

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First you must fully defrost your freezer. Frost simply attracts more frost. A build up of frost large enough to prevent the door closing properly will grow very rapidly indeed and waste a lot of electricity; it will also overload the compressor and can cause it to fail prematurely.

If the seal is damaged then it will allow moist air in and cause frost. If the seal has simply become unseated, then refitting it will prevent a recurrence.

Unless you have a frost-free model, then all freezers eventually need defrosting. You can slow the process by never opening the freezer door unnecessarily and also by never leaving it open any longer than necessary. Frost free models rely on air circulation via a fan to prevent frost build up. If the fan fails, or if the freezer is overloaded and so preventing air circulation then it will still frost up.

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I have this problem as well, only nobody is leaving anything open. The defroster is defective of these things and the duct between the fridge and freezer gets frozen over and the cold air can't get in the fridge, so the freezer keeps working until it's blue in the face.

I think I can assume the freezer isn't a "frost-free".
A short physics lesson; hot air holds more moisture than cold air; hot air will flow from a warm area to a colder area, and the colder area will cause the moisture to condensate and freeze(if colder area below freezing, as a freezer should be), causing frost build up.The more often the freezer is opened, the more frost will build up.
Now for 3 possibilities:1) If it is a self-defrosting type, check your defrost timer control...not working, or not working often enough.2) Door seals damaged and need replacement.3)Make the kids stay out of freezer.

Check the fan and readjust temperature control to higher. Thanks.

first just take it out and clean that one carefully .And then set correctly and observe it,s working condition.then also it's not working means show it to ur near by worker those who repairs it

Defected DEFROST HEATER can cause frost build up on the panel at the back of the freezer,and freezer stop cooling and ice frozen on unit so air could not flow to refrigerator side.Water will coming out caused of unbalanced freezing,and causing the flooding of water in the floor. You must change this defroster heater assembly so it will works normal again..


Hope this may help;

Regards,
VOTIT