My roof airconditioner leaks drain water on the floor.

This will be a blocked sunroof drain.

https://www.google.com/search?q=2008+ford+taurus+x+sunroof+drain

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It could be the sun roof. It also could be clogged drains from the sun roof. It may also be door seals Leaking. It could also be leaking around the bottom of the windshield. A good way to narrow it down is to get inside the car and have someone spray the outside of the car with a water hose. while you look for water leaking inside of the car. If it does it while the ac is on may be a clogged ac drain. however it usually just leaks on passenger side when it is that. well good luck.

Sounds like the door gasket or trunk gasket is not sealing.
You may have to take it to a body shop to find the problem.

check the drain hole in under the front window voth side you will probably find a lot of leaves and muck in there clean this out. if sun roof fitted after you do this blow out the muck in there and re do the front pars again. check the wiring seals are ok and that there is no rust on the walls inside there. it should stop now. also this can happen in vectras to on the roof near to the rear doors on both sides there is a plastic cover. take them off and reseal them at same time put the plastic bit back on so the sealant holds them in place the check the seal in the boot just after the part just sealed there is to gromets with the wire coming out make sure they are in good and sealed and the seal on the part from roof to boot don't have splits in the seal if it has reseal them. had to do this to father in laws as the boot started growing mushrooms and mould. also check the seal on the arial if fitted to the roof.

There are drains for the sunroof that are located in the coners of the roof, these plug up and the water drains into car, you will need to remove the cover were the seatbelt is and see if the hose that connects to the drain fell off or if drain is plugged, open the roof all the way back and using a bottle filled with water , pour over the drains one at a time and see if it drains if not you will need to use a coat hanger and unplug them but i would still check for the hose off on the side that leaks water. good day.

Never need a dealer for any auto repairs ,why do you think ,there are 200,000 repair shops on every corner?

The roof drain hose may have come off
Loosen headliner and check out

Roof drains may seem clear,but are the drain hoses,actually on the roof window frame.
Remove the head liner to be sure

Why can't the dealer use a dye type test or smoke tester. The smoke doesn't just have to be used for EVAP, that it was designed for. And you wonder why I do all my own work?

I just commented on this same prob........check to see if the drain is clogged. That would be the A/C evaperator box and it has to drain.

have the rubber seal around your windshield check by a wind shild installer base on what you explain the sel at that corner is leaking and the water is leaking back into the vehicle

I am the original owner of camry xle 1998 with wet floors. In 2000 I had drivers side door seal leaking at welt. Removed old door seal and new weather strip on drivers side installed. The door panel was never wet, but wet at bottom of door where there are drain holes...slowly leaking under carpet.
In 2001 later water again. Coming from overflowing A/C evaporator-drain plugged/ tank full of debris. Removed evaporator, cleaned + drain cleaned.
In 2003, driver door seal against window rotted. Removed door panel and found leak at window belt molding at the mirror joint inside + out. Lots of mold under carpet needed to replace! Made a fuss at dealers for reacurring problem and they replaced the carpet for free.