Brown fluid leak (smells like dirt) from Sub Zero

Probably overflow from the Defrost pan, mixed with dirt from the condenser and on the floor. Or is this within the refig.? If so something is leaking or has been leaking from a bottle or container probably toward the back of the refig. and down the back side to the bottom. Check all shelves for the leaking culprit.

Use paper towel or tissue. If not degraded (too old) it will be pink color For Automatic transmission. Brown to almost clear if recent oil change. Dark brown if Standard transmission. But if it's top, most likely Engine oil. Check for drips on the floor too.

blace?
is car 4WD?
ok, is this your first car?
is this your first car with A/C? for first time ever using and A/C?
(btw front defrost mode uses A/C functions)

if pure water, its just A/C condesate, 100% normal all cars.
today cars have a wide variaty of new fangled fluids.
in the olden days we had tan, and green'
now its many.
toxic AF (antifreeze) green, pin, yellow, red, orange , etc. now.
Engine oil think goodness is just tan/brown or black
pull dip stick gander at the tip (THAT is your color today)
now the transmission, A./T automatic, it usually is pink, but can be
read or dark red. (if your year has a dip stick on A/t pull it and bingo your color is there)
then there is the leaking, (rare) window washers. (can be any color)
but is soaping to the touch.
last is M/t boxes. manual gear boxes,, and transfer case (4wd)
the they can be , clear to brown. my synthetic is clear but is very viscous, and smells sweat.
Some axles and transmissions have (gear boxes) have hypoid gear lube that is brown and stinks to high heaven.. nasty smell.
But this too can be different today, and be any color, from clear to purple to brown.
last is brake fluid, its always clear, but in large volume or old is amber.
it smells sweet. and sticky.
that is what we have today.

find your cars A/C condensate drip tube under car
and memorize that location, then when it leaks, you know.
its that.
on some cars its at passegers toes.
on my jeep its dead center, of car.

ac drain pipes are on the passenger side front floor area (just about where your feet go) under car when cars heater core gets a hole in it lots of times antifreeze will leak inside car on floor try to get a small sample of fluid thats leaking out with a tissue or something (white In color) see what color fluid is ,see if fluid is slippery like oil or not (rub it between fingers)
Antifreeze= orange or green in color
Transmission oil = red or brown
motor oil = brown to black
washer fluid = Blue or drk orange
ac condesate= clear water (cold)

dirty transmission fluid sounds like you have a rusted line

Its probably old worn out antifreeze/coolant.. HOPEFULLY not oil...you need to contact a QUALIFIED professional...Hopefully new hoses, thermostat, (maybe water pump)and a good flushing will fix the problem..pray its not oil...you will need to have the car towed to the repair shop.. ask around..(friends, neighbors,(google search with GREAT reviews) and do not chose one at random...

Good luck..

the thick brown liquid is decomposing moss, from the condensate inside the unit finding a way out.(think of it as the same stuff you get around a shower tray)clean out the fridge using clorine bleach and dry thoroughly....leave the door open for the clorine to gas off otherwise it will taint the food.when the smell has gone then close door and switch on.(some people use milton fluid,but clorine kills all known germs....)

The boiler/element needs to be replaced.

Mark, the "brown stuff" is a build up of old soap, dirt and often mildew. Yea, gross huh? The best way to get rid of it if you have a bad case (which sounds like you) is to remove the spin basket and actually clean all the crud out. Once it has been cleaned then you should do at least 1 load of wash a week on HOT and it helps keep the gunk away. Some places offer products that are supposed to remove the gunk but I have yet to find one that does. The brown stuff is not related to a bad seal on the shaft. Good luck!

Right hand side wall in the freezer - take a look- any frozen water or moisture? Need check a drain line, usually defrost heater inside the freezer wall getting bad and draining water just freezing inside of it.