Water in wood's fridge
If you have the wire metal shelf model, there is a wrap around cooling plate (back and two sides) at the top of the inside. The frost that forms on this while it is running melts off after the compressor stops and the water runs down, into the drip channel, and out the drain hole at the center of the channel on the back wall. Clean out that hole so the water will flow out instead of down the walls to the bottom of your refrig.
If you have the glass shelf model, you have to remove the metal cover at the bottom back of the refrig and clean out the defrost drain hole located there.