Freezer freezes food after defrosting. After 2-3 days does not freeze anything but stays cold inside. Fan does not kick on at all.

you may have ab ad fan inside the cooler and all of the cold air is staying at the bottom. Also there may be bad insulation at the top and there may be warm air up there.

it could be that your fridge,freezer setting is not turned up high enough to keep the freezer cold enough.turn it up to setting number 5 at least and if that dont do it u could have a faulty thermostat.have it checked by a engineer.

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....

Sounds like one or more of your defrost components are bad. Those components are defrost heater, defrost thermostat, and defrost timer or board depending on model.

remove the rear cover inside the freezer if it has a lot of frost on it,then the evaporator coil is frozen up and you cant blow cold air over or thru a solid block of ice,defrost it,then check the defrost heating element,defrost thermostat and timer or defrost circuitry for no power or defective components,you can use a hand held hair dryer to defrost it quicker

THE RED WARNING LIGHT KEEPS COMING ON AND I HAVE TO KEEP PRESSING THE FAST FREEZE BUTTON, THIS IS EVERY FEW DAYS. IF I DONT NOTICE ALL THE FOOD DEFROSTS!

Could be that the automatic defrost feature is not operating properly. You can go here if you want to find out how you might be able to fix it yourself, but you'll need to be comfortable with diagnostic testing and taking your frig apart. Otherwise, it's very repairable...contact a reputable repair company to come check it out.

I would definitely start by checking if the fan is working. Note that the fan is switched off when you open the door, so you need to press the door switch and then check if it is working. If not, that will be the problem.

Here are some short videos on how to fix your problem...
Frigidaire Upright Freezer Not Freezing Repair Help 297250000

Fix freezer not freezing but still cold

If this is not a frost free unit. I say replace it. I don't believe in recharging a deep freeze. You can never really trust them again. The food inside is worth more than the freezer. If this is a frost free unit, See if the fan inside is working. This can also be a defrost system proplem such as a timer and well worth fixing.