Water is building up on bottom of fridge
If you have water build-up on the floor of the food compartment, or ice buildup on the floor of the freezer compartment, you are probably suffering from either a frost problem or from a clogged defrost drain.
Remove everything from your freezer, including all food and any shelves. Do not remove the icemaker (if installed.)
Look at and feel the panel covering the bottom or back of the freezer compartment. Is it thick with frost?
On top freezer models, are the holes in the top of the food compartment that lead to the evaporator choked with ice?
Is there ice forming on, or lots of water on the ceiling of the food compartment?
If the answer is yes to any of these questions, there's probably a defrost problem.
If you suspect a defrost problem, first remove any icemaker that may be installed. You will see a removable panel covering the entire back or bottom of your freezer compartment. There may be 6 to 10 or more screws holding it on. In some units there is a light socket attached to the panel; you'll see this arrangement most often in side-by-sides.
If you start to get an unusual buildup of ice in one particular spot in your freezer, especially beneath the icemaker, check for water leaks.
Water leaking onto the kitchen floor not traceable to one of the problems in Chapters 4 or 6 may be from a leak in the icemaker or door dispenser water system. Icemakers have a water solenoid valve mounted on the back of the fridge, usually behind the back bottom panel, and a water tube that leads straight up the back of the fridge to the icemaker. Door dispensers have a similar water solenoid valve with a water tube that leads beneath the fridge and into the door through a hollow hinge. If your fridge has both features, it's usually a dual water solenoid valve. It can be simple or not-so-simple to fix, but basically it's just a plumbing job.