Have a TFX26ZPDA that occassionally leaks from front freezer corner. notice of leak anywhere, but find water under the fridge on the floor (facing fridge left bottom)..........why is this

draining tube plugged which normally would drain defrost water to a evaporating pan under fridge

I think you need a new fridge/freezer. Look for offers now on sale some are quite reasonably priced and home Depot has interest free credit.

You may have a leaking door seal, check for gaps in the door seal.

Two possibilities:
1. A cracked plastic tube. These will leak whenever there's a call for water - either the chilled water dispenser, or re-filling the icemaker tray (two seperate tubes). Pay particular attention to anywhere the tubes are clamped to the chassis; anywhere they're routed near or under the refrigeration unit; and near the solenoid valve - especially if there's a tight loop in the tube there.
2. A bad (leaking) connection where one of the tubes exits the water valve. Again, these will leak whenever the valve is activated.

Those plastic tubes don't last forever. I've replaced many of them for the same symptoms. They're known to simply deteriorate with age.
Manuf's make good money selling replacement tubing kits.

found norcold #160107210--new #160107200-----on E-Bay ,under RV Thermostate-----thru seller---- eastcoastrv---Lexington,South Carolina

That is from your defrost drain either being clogged with food, or covered with ice. Behind the back wall in the freezer is a drain that empties underneath the fridge. If that drain gets blocked or froze over then the water will dump into the floor of the freezer and out the door gasket. Look in your freezer floor for ice build up. If you don't see anything like that or if you think the water is coming from underneath the fridge, then it is your condensate pan underneath. They crack sometimes.

The drain is clogged and needs to be snaked out.

try checking the tube that water drains out , it could be plugged with crumbs or old partials of food and causing the problem, This has happened with my fridge at one time , affecting the defrost cycle of the freezer and dripping water out of the door, The tube was located under the crisper in the back of the inside of my fridge, Hope this solves your problem

hi August.
Cause: A blocked defrost drain is one of the most common causes of water leakage. This happens when food particles or other debris clogs up the drain hose, which can lead to ice buildup and, eventually, water leaking out of the freezer and refrigerator.
3 common refrigerator problems you can easily fix yourself

The freezer drain hose will drain the defrost water into a drip pan at the bottom of the freezer. When this pan becomes full, it will leak water onto the floor. This is a regular maintenance task whenever the freezer defrosts. Empty the drip pan during the defrost cycle.
How to Fix Water Leaking From the Bottom of Freezer

Why is my fridge leaking water on the floor? If the refrigerator is leaking water it's possible that the refrigerator has a clogged or freezing defrost drain. If the defrost drain freezes the defrost water will overflow the drain and drip down to the bottom of the compartment, If enough water accumulates in the bottom it can run out onto the floor.
SOLVED Water leak in refrigerator Refrigerator

I don't have the same refrigerator, but had a similar issue with a GE. Melt the ice at the bottom of the freezer. I think the water comes from the auto defrost feature. There should be a hole at the back bottom of the freezer that water would go into, and run to an evaporator pan under the refrigerator. The tube may be blocked that allows this water to drain, so it is backing up in the bottom of the freezer, and overflowing through the front bottom of the freezer to your floor.