Water pooling inside or underneath your refrigerator is often a simple fix-appliance.ca. The most common cause is a clogged defrost drain. Food particles can get trapped, causing water from the freezer’s defrost cycle to back up and spill into the fridge compartment or onto the floor. Consult your manual to locate the drain hole and clear it using a turkey baster and warm water/bleach solution or a small, soft wire. If you have a water dispenser, a leaky water inlet valve could be the culprit.