The answer to 'why is my AC leaking water' is that there are several common causes, including a clogged drain line, a problem with the condensate pump, or a refrigerant leak. The most likely cause is a clogged or blocked drain line, which can prevent the condensation from draining properly and lead to water leaking from the unit.
Other potential causes include a malfunctioning condensate pump, a refrigerant leak, or a problem with the evaporator coil. Symptoms of an AC leak may include water pooling around the indoor unit, wet floors or walls, or even water dripping from the unit itself.