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What is the model number? Do you see any frost on the back wall of the freezer?
There is a damper that controls air flow from the freezer to the fresh food compartment. Can you fell any air coming out of it?
The part is number 219 in this diagram. http://www.searspartsdirect.com/model-part/pfss5njwass/0432/0161000/g0990156/00004.html It can get blocked with frost if the door is left open.
Is the damper open? Is the fan in the freezer running?
You got help, you're not giving value to that?