Refrigerator Fills with Water

My refrigerator keeps filling with water - the crisper drawers, meat drawer and the bottom of the refrigerator is FILLED with water. A tenant moved out and left it this way - I thought it was just defrosted and not cleaned but it has been like this for a month - no matter how cold I turn the settings. It does NOT have an in - door water dispenser (not sure Roper even makes that). I appreciate your input. This refrigerator is less than 5 years old and I hate to dispose of it.

Here are your parts
http://www.appliancepartspros.com/partsearch/modelsearch.aspx?model=RT18DKXKQ05

Sounds like the drain line is clogged.
Here is a good thread about this.
http://forum.appliancepartspros.com/refrigerator-freezer-repair/57529-cant-unclog-freezer-drain.html

Thanks so much for your input, I will check into that !