Frost and Ice Buildup

the drain is clogged

could be anumber of things happing, is the freezer fan spinning? if not ice will accumulate( also hamper cooling in the refrig section). perhaps a defrost issue, a bad heater or defrost thermostat could also cause, this/ may even just be the door being left open for extendedperiods of time( ie.. overnight, or hte gasket not sealing correctly) leading to a frost build up on rear panel

If it is not a frost less freezer you'll have to remove perishables to another fridge/freezer; unplug and de-thaw the unit.

the flap may not be closing, or may not be seating correctly.

During the defrost cycle heaters in the wall of the freezer are turned on to melt the frost build up. This melted frost "water" is supposed to run out a drain in the bottom of the freezer and collect in a pan under the refrigerator/freezer where it will eventually evaporate. If this drain is blocked it will cause a lot of water to collect in the bottom of the freezer and that water will eventually turn back into ice. I recommend defrosting the freezer manually, removing all the ice/water buildup in the bottom, and trying to unplug the drain line to the pan underneath. Also check the seal on the freezer door. If it's not sealing well it could be letting a lot of moisture enter the freezer which would lead to more frost buildup and more water during the defrost cycle.

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 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 can 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 your ice maker causing this are very, very slim...in 35 years in the industry ..I have never had an ice maker cause frost due to water spray...it will almost always result solid sheets of Ice..if it evers does cause a spray....which like I said is rare...lottery ticket type rare :-)

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

That is normal. The refrigerant runs through those shelves. They are the evaporator side of the unit.That is where the freezing effect comes from.
Check door seals for leaking air.
Keep door openings to a minimum.
Get in there and get out.
Those things will help prolong frost/ice buildup.

Replace the defrost clock.

Your frost free is not defrosting properly. There should be no ice buildup in the freezer section. Frost in the freezer section stops air circulation to the refrigerator section.

Frost is due to outside air leaking into unit. Check on back wall to see if hole for ice maker fill tube is still plugged. If not and you have no ice maker cover hole with tape. Also look for water or ice build up in bottom of freezer or ref. sections. May have a plugged drain. Let me know what you find.