If the coils are cold enough the defrost thermostat will allow the defrost heater to turn on.
Maytag freezer frosting over.
Too little or too much food can lead to frost in the freezer.
So when you open the door on a full freezer letting in warm.
Once food items freeze they help keep the air inside the freezer cold.
Door gaskets one of the most common causes of freezer frosting is the door gasket.
G the evaporator coils to frost over.
If the ice build up is only happening in the freezer the freezer drain is probably clogged.
Pour hot water down into the drain hole until you see the water dripping into the drain pan under the refrigerator.
The gasket should be clean too.
The gasket creates an airtight seal between the door and freezer cabinet to keep the air inside cold.
Check the seal around the freezer door carefully to see if it is torn or damaged in any way.
Frost is likely to build if the door is left open for a long period of time.
If your freezer is frosting over it may be due to a broken door lid or gasket.
Over time the doors may begin to sag allowing warm moist air into the refrigerator or freezer door that creates excessive frost that can eventually cause the drain tube to freeze.
Cool air enters and exits the refrigerator compartment from the freezer compartment through vents.
We have cleaned it out and are defrosting now but doubt this is going to solve the problem.
Make sure the door is closing completely and is not blocked by something between the door gasket and cabinet.
Blocked vents can cause a couple of different issues including moisture build up or excessive frost.
To unclog the drain you should first unplug the unit from the wall.
Remove the freezer covers to expose the frozen drain.
To determine if the defrost thermostat is at fault use a multimeter to test the thermostat for continuity.
This allows excess humidity to enter the refrigerator and freezer sections.
If the gasket is damaged it may be letting warm moist air inside the freezer which can result in frost when it comes in contact with the freezing cold surfaces inside.
My maytag refrigerator s freezer bottom has a bunch of frost on the inside on the walls and food.