Hello geri,
When you say freezer is working you mean freezing?
If the freezer is between zero-10 degrees and the fan motor is running usually indicate the airflow is not getting into the fresh food section.
You might check the damper control to see if its opening up and/or the vent clear.
I have also seen in some cases where the foam venting gets wet or breaks apart.
Click here for parts breakdown and look at diagram # 4 items 426, 428 and 429 damper parts. It may just not be opening