Freezer wont cool.
There are several things that could go wrong with the unit to keep it from cooling. You will want to check the defrost circuit for the freezer to make sure that the unit is defrosting. Check the evaporator fan to make sure that it is running and there is a switching valve on the back of the unit that is part of the sealed system that could have failed. You will want to check the frost pattern on freezer evaporator and if there is no frost pattern but the refrigerator section is working then that would most likely be the issue.