It could be a few differant things If you dont hear the freezer fan that would make it not cool, If there is a thick layer of frost in the freezer section down the back panel you have a defrost problem and it wont cool if the compressor is running and not cooling you could have a sealed system problem when you turn the control to "0" I take it that thats the off position? so you need to verify all fans are running, verify the compressor is running verify there is no frost by removing the back panel inside freezer and checking the frost on the coils to much frost is bad and not enough frost is worst.

The serial number is DG246207.
After viewing v2k04's response and other entries in this forum I found and repaired the problem. The main board smoked. Looks like a couple resistors cooked. Got a new board and everything is working as advertised. Thanks for the help and for this forum.

Thanks for the tip abadfish. Makes sense that this would be a cause. Is replacing the fan difficult? Any instructions would be appreciated.

The caps look OK. Don't think the resistors were smoked even though they have black on them. It's been my experience that when a resistor burns open you can usually break them in half pretty easily. Not the case here. After looking at the board a little closer it looks like a transistor or diode may have started this. Xsistor Q15 and diode D30 are on either end of the resistors that show burn marks. I am leaning more toward the Xsistor. Don't know if you have a schematic and not sure what the old board nomenclature is. It has a GEA Part # of 200D4854G009. The components that have burn marks on or around them are Q15, Q10, R43, R27, D31 and D30. The replacement board is a WR55X10656.