Freezer not working, things to check

I do not believe the problem is the fan. sounds like the frig. is low on Freon this is what will cause the ice build up. you need to find the leak, you can do this by spraying soapy water on coil tubes & watch for bubbles. repair leak & recharge.

The unit needs two fans running and good airflow, one fan outside cools the condensor coil and the other inside the unit blowing across the evaporator. The compressor must start up. The defrost timer stops everything and switches on a heating element to defrost the evaporator for several minutes. Please verify these conditions.

Hello,
Check the temperature setting
Assure that there is enough room for air flow in the freezer or freezer
Check for air flow restrictions in vents
Test the temperature control
Clean the condensor coils
Check the door seals
Test the door switch
Test defrost heater
Test defrost timer
Test evaporator fan
Check for a clogged drain tube
Check for refrigerant leak
Freezer is too cold

Check the temperature setting
Test the temperature control
Freezer is noisy

Hissing and popping is normal, it is the defrost heater.
Check that the freezer is level
Check the drain pan
Check the condensor fan
Check the evaporator fan
Inspect the compressor mounts
Freezer runs continuously

Defrost the freezer
Clean the condensor coils
Check the door seals
Freezer starts and stops frequently

Clean the condensor coils
Check the outlet voltage
Test the condensor fan
Test the compressor relay
Test the overload protector
Test the compressor motor
Freezer does not defrost automatically

Test the defrost timer
Test the defrost heater
Test the defrost thermostat
Freezer has an unpleasant odor

Remove spoiled food
Clean freezer interior with a solution of h
Clean freezer interior with a solution of hot water and baking soda
Clean the door seals
Remove breaker strips and check for wet insulation
Water on floor outside of freezer

Check the drain pan
If you have an ice-maker, check the water supply hose going into and coming out of the water inlet valve
Water inside the freezer

Check for a clogged drain tube
If you have an ice-maker, check freezer and ice-maker for level.
With all this it helps to solve the problem....

First, check the compressor fan. Make sure it is turning. If this fan is not working properly, the refrigerant will be be cooled adequately. This lowers the efficiency of the refrigerator and causes it to run more.

The fan is probably located in the back of the bottom of the refrigerator. It pulls air across the coils and blows the heat out the back of the unit.

If the fan is not turning, the fan motor will need to be replaced.

The fans are controlled with a clixon that has a cut in at 5 degrees, and cut out at 20 degrees. If the unit is running and the fans are not comng on then I would have to say you are out of freon. But your condensor fan could be running and the compressor NOT be running which could be a problem with your compressor. Find out if your compressor is running by taking an amp draw. If compressor IS running then you are low on freon. If the compressor is running and your evaporator coil is cold and your fans AREN'T coming on then your clixon is bad.