The part(s) or condition(s) listed below for the symptom Air conditioner leaking water are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
If the window or through-wall air conditioner is leaking water from the front, this indicates that the air conditioner is leaning too far forward. The air conditioner is designed to expel the condensate water from the back of the unit. Because of this, the air conditioner must be installed so that it leans back on a 1-2 degree angle.