How to Test the Defrost Heater
The defrost heater 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 or bottom inside panel of the freezer.
Before testing the defrost heater, unplug the freezer to avoid an electrical shock hazard.
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.
There are three primary types of defrost heater elements; exposed metal rod, metal rod covered with aluminum tape or a wire coil inside a glass tube. All three elements are tested in the same way.
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