If water is leaking into your fridge, the most likely reason is that there is a buildup of ice in your freezer that is causing condensation. The solution is regularly defrosting your freezer to prevent ice from building up. This is most likely to happen if you have an ice maker, but if you defrost the ice maker and the problem persists, there could be a blockage in the drain line. This can be fixed by unplugging the fridge and pouring hot water down the drain hole. If this does not the fix the problem, you can also use a snake tool to unblock any debris.