I have cold water dripping onto the passenger front floorboard when the a/c is running.
I found the condensate line, where it runs down the firewall outside... and I'm assuming it is clogged and this is what is causing the problem.

Do I just blow compressed air up it? Or will this just blow the gunk further up into the system?

Try and hook a wet vac up to the end of the line?

thx.

 

air compressor and a air blower just blow it up through there and stand back if you have enough pressure it will rush out everywhere this is how we do it at honda

 

So did you try this or what? Cuz I'm having the same problem but its just dripping a little so far inside the car.