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Question

Hi. You helped me with the washer machine a couple days ago and thanks a lot again. Do you know anything about upright freezers, specifically Frigidaire/Tappan freezers? If so the freezer isn't freezing anymore and we can't figure out what's wrong with it. Would it even be worth repairing? And the product line won't be correct because it won't recognize the product so I'll give it to you here.
Frigidaire 11.7 cu. Ft. upright freezer model # 4124305/TFU12M4AWO