There was a discussion not long ago (with pictures!) about the air conditioner's drain pan, where it is located, how it drains (through a tube), and how to unclog the tube. Perhaps someone will post a link to the discussion, or a Search on "drain pan" might find it.
This is it http://www.trailmanorowners.com/foru...d.php?t=18132]
You should not have to reseat or adjust the air conditioner itself - just push a wire or a pipe cleaner through the tube. The condensate does not drain under the unit, but as I recall, from the side of the unit and down onto the roof.
Bill