Open the air handler to check the evaporator coil. Clean the air conditioner coil. Cleaning will not fix the problem if there is a refrigerant leak. This should only be repaired by an HVAC technician.

Dripping can also result from frozen evaporator coils — usually an easy fix ... If a newly installed window air conditioner leaks onto the floor, it's probably not tilted enough toward the ...

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