Bottom of freezer keeps filling with water and freezing. Behind the produce drawer higher up is an area with what appears to be a drain hole that is clogged and that area is full of water, but we cant figure out where it drains to. The refrigerator came with the house which was built in '99 (so it's probably 15 - 16 yrs. Old) and I cant find an owners manual here or online. The temp was on a very cold setting so I turned it up a bit, I ran across a thread somewhere that a guy posted with a model close to mine, who was having a similar issue, and he mentioned that the manual said to pour hot water with baking soda down the drain hole.

Any suggestions?
Know where to find the owners manual?
Anyone know the general life span of these, is it worth having a repair man out?

Those refrigerators will last as long as you want them to last, at least 35-40 years for starters. They last longer than the new ones, but all refrigerators need regular washing out. If you can get a hand truck take it outside and remove all shelves and then remove the cover to the back and to the freezer coils inside, plus any others necessary in order to reach any drains. You also have a front kick plate that should be removed. You can now wash out the drain pan(s) under the refrigerator (Lean it over if you need to do so because it will not hurt it at all as the urban myth says. The oil will not go anywhere on the inside.). Blow out the drains with the water hose until they are unstopped but be careful of the drain heater in the freezer. It looks like a coil in tin foil, which it basically is in some units. Scrub down everything with bleach and liquid soap and a soft scrub brush. You need to wash the coils and the fan under the unit with soap also to get the grease off the coils. Then, you need an oiler to oil the motors (It is found in most appliance and HVAC parts stores for $2.00 or so.). On many motors like the open type I remove the end caps and squirt oil in the felt reservoirs. If the motor is a sealed condenser motor I will take an ice pick or 1/8" drill and put a tiny hole at top of oil reservoir on the center-rear part of the motor. You can then easily fill it with oil which will last many years. After you finish put the covers back on. The covers, especially the one on the rear of the refrigerator direct air flow. You now have a like-new refrigerator. Here is a manual for a later model: https://dl.dropboxusercontent.com/u/8010163/GE_Profile_Side_by_Side_refrig.pdf