The evaporator fan circulates air over the refrigeration coils. The coils absorb heat and the chilled air is then circulated. If the fan does not operate, the freezer will not cool properly. The fan motor may have failed, but check first that something is not simply blocking the fan blade.
Before testing the fan, unplug the freezer to avoid an electrical shock hazard.
The evaporator fan is located at the back of the freezer. It may be necessary to remove obstructions such as the contents of the freezer, freezer shelves, ice maker and the rear inside panel of the freezer in order to access the fan.
The rear panel may be held in place by retainer clips or screws. Remove the screws or depress the retainer clips with a small screwdriver.
Remove any screws that secure the fan or fan housing so that you can access the fan's wiring. Typically two screws secure the mounting bracket in place (labeled "A" below). It may be easier to remove the entire rear panel if the mounting brackets screws are inaccessible.