Leaks water inside from the ports or vents under freezer but in fridge

Your problem more than likely is a plugged defrost line in the freezer...The freezer goes through periodic defrost cyles to keep the coils from freezing up. The water catches in a trough pan in the freezer and flows through a drain hole to the bottom of the fridge where it evaporates. This drain hole perodically freezes up and the water accomulates under the freezer bottom until the water level reaches your vent ports to the fridge section. Open your freezer and on the bottom floor of your freezer you should see two screws near the front on either side. Remove them and then take out the bottom tray....this will expose the drain hole near the rear of the freezer compartment. You will more than likely have to remove ice under the tray in order to see the drain hole. Remove the lower back panel on the back of the refrigerator and you should be able to see the drain line coming from the freezer. Unplug the refrigerator before you begin work. It will take a little while for the drain line to thaw to allow liquid to flow to the bottom. I find a hair dryer pretty handy in speeding up the process. To verify you have unplugged the drain line you should be able to pour hot water in the drain hole in the freezer and see it come out at the rear of the fridge in tube line just above a little catch pan