The condensate drain is the part of the AC system responsible for removing condensation from the evaporator coil. Because of its close proximity with moisture, it can easily cause leaks.

Dripping can also result from frozen evaporator coils — usually an easy fix ... If a newly installed window air conditioner ...

a leak in the evaporator releases only refrigerant vapor. A clogged drainage channel is a common cause of water in the front foot wells.