The answer to 'why is my air conditioner leaking water' is that there are several common causes, including a clogged condensate drain line, a frozen evaporator coil, or a problem with the unit's drain pan. Leaking water can be a sign of an issue that needs to be addressed to prevent further damage to your home.
One of the most common causes of an AC unit leaking water is a clogged condensate drain line. As the air conditioner cools the air, it also removes moisture from the air, which collects in the drain pan and is supposed to drain outside. If the drain line becomes clogged with dirt, dust, or mold, the water has nowhere to go and will start leaking out of the unit.