"PRW" wrote in message
...
We have a window air conditioning unit in one of our windows. It is
mounted tilting downward, which is supposed to ensure that the
moisture produced by the cooling process flows out the back of the
unit. However, since we got this unit about a year and a half ago
(it's out of warranty), and it's doing it again now that we've turned
it on for a few hours, the moisture just pours out of the vents.

When you look inside the vents from the inside, you see a styrofoam
area with an opening in the middle where you can see the fan in the
air conditioning unit. Looking at the unit from the back, from
outside, the styrofoam part is closed off from the working parts of
the air conditioning unit and the back grille.

When the unit is operating, you can sit there and see an enormous
amount of water pool up inside the grilles around the styrofoam area,
I mean an enormous amount. It doesn't appear to have any outlet to run
back to the back of the unit, it certainly doesn't appear to be
running down into the opening to the fan area. It just pools up and
blows out the vent grilles. You can literally hear the thing sloshing.

We have tried everything and it's impossible to mount this unit tilted
any more downward at the back ... you can see the downward slant in
the styrofoam area ... but it continues to blow water out of the
grille to where we have to keep towels on the floor in front of it.
I've even thought of punching holes in the styrofoam to see if that
might help the water stop pooling up in the area around the vents.

Does anyone know what might be going on here, or have any suggestions
for what we might could do to fix this. It's a great air conditioning
unit as far as cooling the small area we use it for, but we're getting
tired of having to clean up water from it.
You have gotten a lot of good advice. I just wanted to be sure that you
understand that the water runs off the inside coil down into a tray or just
the bottom of the unit. From there it MUST find its way through the unit
into the outside section. Many (most?) units have a slinger on the outside
fan that throws the water on the outside coil. This evaporates the water and
cools the coil. Some units only have a drain for the water and I think most
have at least an overflow drain.

The water passage from inside to outside is very small and often gets
clogged. Sometimes it is only a slot under the bulkhead. If you make a big
hole it will pass a lot of air as well as the water. Just figure out where
the proper passage is and clean it out. It does not take a lot of slope on
the unit; at least some manufacturers suggest a level installation.

Don Young