Freezer not freezing

I have a Frigidaire freezer Model LFFH17F7HWG that within the past week has had temperature fluctuations. I can’t lower it beyond 16 degrees. It has shown up to 27 degrees on the front panel but it goes up and down but never lower than 10 degrees. Today the fan has started to make a racket. I am not sure where to start. Suggestions would be much appreciated.

How are the condenser coils? Make sure that they are %url%.
Also, check the evaporator and make sure that there is no frost on it.

If you fan all of a sudden started to %url% it suggests that either their is something in the way of the fan blade or that something is wrong with the motor.