Frost in Freezer. I have a Frost Free LG fridge that is only a year. The top Freezer has frost

Question

I have a Frost Free LG fridge that is only a year. The top Freezer has frost like snow and the cooling vents freeze right up so I can't turn it down.All the food has a layer of snow like frost on it. I have defrosted it and cleaned it a couple of times but it ends back to this every time. Tia C.C