Why is My Refrigerator Leaking Water?
If your refrigerator is leaking water and causing water damage to your flooring it’s usually because of one of two reasons.
Reason #1 your fridge is leaking:
A blocked defrost drain is one of the most common causes of water leakage. This happens when food particles or other debris clog up the drain hose, which can lead to ice buildup and, eventually, water leaking out of the freezer and refrigerator.
Fix: First, try flushing the drain from inside the freezer with warm water, using a turkey baster or a small funnel. You can also try using a pipe cleaner or a straightened coat hanger to forcibly remove the clog. If this doesn't fix the problem you may need to manually remove the debris that is clogging the check valve at the end of the drain hose.
Reason #2 your fridge is leaking
From time to time, a clogged or frozen water supply line will cause water to puddle beneath the refrigerator. It will also affect ice production from the ice maker and slow or stop water flow from the dispenser.
Fix: First, unplug the refrigerator and locate the shut-off valve, typically underneath the sink, behind the refrigerator, or below the refrigerator in the basement. Make sure this valve is closed, and look for any leaks, kinks, or clogs in the plastic supply line.
Source: CNET online