Product review (5 stars): EZ fix for a refrigerator that keeps leaking water in front of unit.
Originally the drain beneath the freezer section had a rubber 'duck bill' outlet, that was supposed to open to allow water out and close so as not to allow moist air in. FAIL !!!!  The rubber valve got sticky and given enough time permanently shut, causing water to back up and (first) run over the drain pan in the freezer, (second) into the bottom of the freezer and then (third) out the door and onto the floor.

Don't cheap out and just clean the duck bill value or you'll be back at it again in a year. Order the right part ($20), then start by taking front door off freezer (loosen 4 screws and lift) then remove 4 baskets. Remove the 4 screws that hold back panel on. You will have to pull the fan cover off (there is a plastic clip bottom front of cover) and there is a thermostat hiding behind the smaller plastic cover. Leave the thermostat dangle. Once you expose the coil, get a air dryer and defrost the drip pan and area below the drip pan. Leave it disassembled until you do the backside work.
OPTION: If you don't want to pull off the back panel, you can let it defrost by itself but it'll take a day. Ice melts slowly. And there's food in your refrigerator, so what's easier? Move all the food or remove the panel? I say pull the panel.

Next pull out the refrigerator and open up the lower back. Unplug the water solenoid power and move the power cord. There is a slide tube that carries water from the drain hole to an evaporator pan and at the top the infamous duck bill rubber valve. Once you pull it off, water SHOULD flow out and into the evaporator pan. Something should drip out and if not, you may not have defrosted all the ice (which is why I suggest, don't put freezer section back until you have water flowing out the drain hole.

It'll take about a minute to install the white expansion washer and then the new trap. Trap does not fit over white rubber washer easily, but with enough patience it will. Don't skip the white washer that came with the new trap. It's the only thing that will keep the tube in place on top (no screws needed). Make sure black tube flange is flush against top, snap the bottom into the clip in the pan. Button it all back up, push it back and put the freezer back together and rehang the door.

Difficulty (1-10): about a 3.
Time it takes: About 1-1.5 hours (about 30 minutes as ice thaws, so you can grab a beer and a TV show)
Tools: Nut driver, hair dryer and flashlight.
Most difficult part: Figuring out how to get freezer baskets out. Don't strong arm them, just examine them from all angles and it'll become obvious. They come out easily if done right. Force them you're doing it wrong. Break them and it'll cost you. Plus your wife will say, "see, I told you to call someone."
Savings if you do it yourself: $250-$350
Having you wife stop complaining and threatening to call someone out: Priceless