(Ireland)
Question:
Otherwise, yes it is possible to clean your fridge in this amount of time but it is not fun nor enjoyable work.
My mother and step-dad just did the same thing with a refrigerator they were given. The first steps they took was pulling the fridge out of the house and using a hose with a pressure nozzle on it. Once everything was out of there they left it open in the sun to make sure it would fully dry. (Make sure when spraying not to get the cord or the back of the fridge wet.)
Next they used a soap and water solution to clean it and afterward a water and bleach solution.
All three steps took a decent amount of time but they now use this fridge everyday in their garage and feel very comfortable with the food they have in there.