On humid days, when you open the freezer door this moist air enters the freezer, then freezes to form frost. Try not to keep the freezer door open for very long. There is really nothing that can be done to prevent the frost. If the problem is much worst than in the past, check the seal around the door for any cracks or holes. If it is defective, replace it with a new seal.
SOURCE: freezer no frost
This is probably due to the failure of defrost timer or the heating coil..Try this
1)The defrost timer is sometimes found behind the front grill of the refrigerator. It may also be found behind a cover plate inside the refrigerator or freezer, in the temperature control console, or behind the refrigerator near the compressor.
The timer is usually held in place with one or more screws. Remove the screws and gently pull the timer out far enough to disconnect the wiring connector.
Locate the timer switch and turn it clockwise until you hear it click. One click and the refrigerator shuts off = defrost mode, second click the compressor and fans come back on = run/cooling mode.
2)If this doesnt work then Test the heating element for continuity using a multimeter. Set the multimeter to the ohms setting X1. Place a probe on each terminal. The multimeter should display a reading somewhere between zero and infinity. Because of the number of different elements we cannot tell what your reading should be, but we can be certain of what it shouldn't be. If the reading is zero or infinity the heating element is definitely bad and should be replaced. Proper power ( careful!! ) to the heating element ( 110-120 volts AC ) and the defrost heater does not come on = bad defrost heater.
SOURCE: Excessive Frost and Ice Build up in Freezer
sounds like you have a clogged defrost drain tube. removing back panel of freezer will give you acess to drain trough, melt away the ice with a hair dryer, youll find a drain hole under there somwhere,pouring boiling water down the drain will clear it pretty quickly( i use a steam machine purchased from the infomercials works awesome, after you clear it and all water drain down tube wrap a piece of solid copper wirearound the heater( black calrod heater right above the drain trough) and stick it in the whole maybe an inch or so. now everythime the heater comes on to defrost it will prevent the hole from freezing over
SOURCE: Kenmore Trio bottom freezer frost free. Producing frost
There are several reasons this can be happening...
1. The seal
on the door may have a tear or may not be seating properly...this
allows excess warm air into the freezer compartment and in its effort
to remove the same ...frost appears.
2. There is something call
a thermistor (which senses temp and ice build up) that is cycled on and off as needed to remove excess frost
accumulation and or ice buildup on the evaporator (freezer) coils...it
is a heat strip which actually defrost the frost/ice. If this is not
working frost will accumulate and eventually it will become
Ice......now the remarkable thing about Ice accumulation is that you
would think everything would remain cold or get colder ..however in
this case the opposite occurs...it insulates the coils and thereby
increasing the temperature...put a thermometer...one that is calibrated
properly...(calibration can be set by placing a thermometer into a
glass of ice water...the temp of a glass of ice water..after a few
minutes setting will be exactly 32 degrees)..if the temperature of your
refrigerator is gradually rising over the period of a week...you will
need to call a tech or replace the thermistor and or trouble shoot
other problems that may have occur such as..
3. The evaporator fan
may be going out although they usually make a high pitched whining
noise of a whirring noise before they go out...not always and if they
are intermittently cycling off then frost would build up...do you
always here a fan running when you open the freezer...if so that is
good...fan is working...but it may be cycling off at times when no one
is aware.
P.S. the odds of it being due to overfilling are slim...I have been in the industry for 35 years and that is what freezers do...which a lot of people don't realize is that freezers don't actually cool anything ..they just remove heat and when you remove all the heat all that is left is cold (like in space) and when heat is removed quickly frost can appear like when you blow your breath on a freezing cold window..then right your name....but I digress...any way..if there was an excess of heat due to a lot of new food in the freezer it would correct itself by one of the processes i mentioned above..and it would never result in Ice..you probably have one or more of the problems I mentioned...evaluate how long its been going on...
4. Thermostat could be out of adjustment..and or not functioning
properly..which would delay or inhibit a defrost cycle..from occurring..unfortunately almost all of these problems require a tech...or a good handyman.
This should lead you in the
right direction...if you need help in finding a reputable service
company in your area let us know..I hope this has been helpful..if so
PLEASE rate me....thank you... .......The Fang
SOURCE: frost forms in freezer, blocking vents so temp in both freezer and fridge is warmer than normal
You have an issue with the defrost system, either the timer, thermostat or heating element. Probably the defrost timer refer to the manual to find it. If you don't have the manual check the makers web site for a parts breakdown. You should be able to put it into defrost manually by turning the knob and see if that helps. You may need to do this sevral times as it only stays in defrost for a little over twnety minutes and run cycle for 6,8 or ten hours. If the ice build up is heavy then twenty minutes may not do the trick thus the need for repated defrost cycles. If it does the trick replace the timer. If not check the thermostat and heater element.
SOURCE: freezer compartment has frost buildup
This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.
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