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A blocked defrost drain is one of the most common causes of water leaking from your refrigerator and is a good place to start troubleshooting. The small drain opening is easily blocked by food particles or ice, preventing water that accumulated during the defrost cycle from draining to the pan.
If your refrigerator/freezer is a side by side model, then the leak would generally be coming from the freezer section and it would make some ice on the floor of the freezer until any depression was filled and then it would leak out the front of the freezer compartment onto the floor about 2 or 3 times a day.