I have a Whirlpool Refrigerator (model WRT579SMYB) top freezer style that I bought in January 2012 (new). There is a wide temperature differential between top shelf & door vs. the bottom shelf. The milk on the door is 40-43F the bottom shelf is 21-26F and the food freezes, especially on the back half of the bottom shelf. The temp swings 3-6 degrees vs. time. The fridge is not 'stuffed' and we don't put food close to where the air comes out. I've had 7 visits from factory service people; they've replaced the thermistor (temp sensor), and the controller. We've rearranged the shelves different ways, and still the food freezes.

I contend that the issue is that the glass shelves (vs. wire shelves) go right up to the compartments on the door and don't allow the air to circulate vertically. Exacerbating the problem, to be energy efficient, they only run the fan when the compressor runs, which is a low duty cycle, so there is not much forced convection.

Is this a fundamental problem or is there something else we should try? If we need to get a new fridge, do you have any thoughts about another model in the Whirlpool line (including Amana, Maytag & KitchenAid) that might be better? They want to just exchange it, which I'm pretty sure will be futile.

Optional Information:
Brand: Whirlpool
Type of Appliance: Refrigerator

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