When water pools or leaks under the bottom baskets or drawers in a refrigerator freezer, the reason is typically a clogged defrost drain. The drain is in the freezer, which is usually near the bottom bins, and it may have a cover attached with screws. If the drain below the cover is frosted over, clean it with a hot, damp cloth. To clear the defrost drain, combine 2 cups of hot water with 1 teaspoon of baking soda, and flush the drain with the mixture using a cooking baster. Repeating the procedure until the baking soda runs easily down the drain may be necessary.
Many refrigerators and freezers have a heater along the door frame to remove condensation that builds up in the unit. Some of those refrigerators also have a switch near the door frame to turn the heater on or off for energy conservation. Turning the heater on for 24 hours when condensation is along the door frame helps to evaporate that water.
Occasionally a water leak from a refrigerator's ice maker or water dispenser line can cause water to pool in the bottom of the freezer or on the floor. The water line connection is in the rear of the refrigerator, and tightening all of its connections that seem loose can help. If the water line tubing is not inserted or is damaged, contact the refrigerator's manufacturer for assistance.
Sometimes the cause of a refrigerator's water leak cannot be determined easily, partially because some components are underneath the freezer and refrigerator and behind their walls. If you can’t find a leak's source and the leak continues, contact a refrigerator service professional for assistance.