KITCHENAID KRFC300ESS Freezer Frost Buildup

Defrost Bi-Metal Thermostat

This component acts as a temperature-sensitive switch that enables the defrost heater. When it fails, it typically remains in an 'open' state even at sub-zero temperatures, preventing the system from clearing frost from the evaporator coils. This leads to a progressive buildup of frost that eventually blocks airflow and compromises cooling efficiency.

SKU: WPW10225581

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Freezer Drawer Gasket

The gasket provides the primary hermetic seal between the freezer atmosphere and the kitchen environment. If the magnetic strip loses force or the vinyl becomes brittle, warm humid air enters the compartment, leading to rapid frost accumulation on the walls and drawer fronts as moisture precipitates out of the air and freezes instantly.

SKU: W10830162

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Defrost Heater

The heater is responsible for the radiant melting of frost during the defrost cycle. If the heating element reaches its end-of-life or suffers a physical break in the filament, the accumulated frost from the cooling cycle is never cleared, causing a permanent layer of ice to insulate the evaporator coils and eventually fill the freezer cavity with frost.

SKU: WPW10300963

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