Old RCA fridge that has a leaking freezer

Marion, this is most likely a drain that needs cleared. When your freezer goes through the defrost cycle, that water has no where to drain to. So it pools in the bottom, then freezes and thaws, over and over again. Try and get some hot water down the drain. If it doesn’t fix it, you may need to empty it and unplug it to defrost for 24 hours. Hope this helps!