MODEL FFU17FC4AW--8 yr old Intermittent leaking coming from left rear as facing freezer. Does not appear to be condensation, although have noticed condensation puddles in the past. What is most likely cause and possible fix and cost to fix. Is it worth a repair person to come diagnose for $70 or should I start shopping?

SOURCE: puddle

all frost free freezers have to defrost the coils. there is a drain pan or cup in the bottom .. if it overflows or it can't drain out you will get puddles check the drain hose and drain cup or pan.. also check to see if you have ice inside the bottom of you freezer that would be a plugged or freezing drain hose..call for services if only 4 months old...

SOURCE: Freezer not Freezing

If unit is running then it is not worth fixing. I cannot see your repyl due to some tech issue w/ the site, so it may be a day or so before I can reply again. Please leave feedback for me if appropriate. Thanks

SOURCE: Frigidaire Ultrafreeze upright just stopped working

It sounds as if your compressor it's running. This could be a bad compressor, bad capacitor, bad thermostat. See that there are no fans or defrost, it is one of the other. I would start with checking the capacitor. You can replace it with a Supco 3 in 1. It cost around $30.00. Anything else is going to start costing $100.00 and more. If you need a freezer that big, I would have it fixed unless it ends up being the compressor.
Please rate solution

SOURCE: What could be causing my 7 year old upright

Your freezer is probably running constantly as well. Lift the bottom vent panel (the one with all the holes in it) and look at the bottom of the back panel. There should be a half inch gap for the cold air return. If you see a solid wall of ice in that gap your coils have frozen over. You need to clean out the freezer and defrost it. Look in the back near the compressor. If your model does not have a drain plug in the bottom then you need to leave the door open and mop up the water as it melts off the coils from the inside. If you can, wheel it outside on a dolly and let it defrost where it can drain on its own. After you are sure it is totally defrosted, plug it back in at a control setting of 5 for at least 4 hours, preferrably overnight, and check the temp. Setting the freezer at 7 will encourage ice buildup. Your problem may be a bad defrost timer, which your local appliance parts store may have.

SOURCE: freezer seems to be leaking

Yes, if the condenser coils are not on the back of the freezer or underneath they put them in the walls of the freezer where they are not accessable with out destroying the box to get to them. So if that is where the leak is then no it is not repairable.......if the leak is in the evaporator and if the evaporator is Alumium then it is also not repairable.