Water under your refrigerator is not a good sign, but it is also a very regular occurrence that is usually easy to fix. One of the most common causes is a clogged defrost drain. This occurs when food particles or other debris plug the drain line, resulting in ice accumulation and, eventually, water escaping from the freezer and refrigerator. Another likely reason your fridge is leaking is a blocked or frozen water supply line. It will also delay or stop water flow from the dispenser and influence ice output from the ice maker.