Why is my AC leaking water inside my house in Fort Lauderdale?

Why AC Units Leak Indoors

Fort Lauderdale humidity keeps AC units running almost year-round, and the condensate line that carries water away is the first thing to fail. It is a narrow PVC line, and algae grows inside it fast in this climate. Once the line clogs, water backs up into the drain pan instead of draining outside near the unit.

A drain pan under the evaporator coil is built to catch normal condensation, not to hold a full backup. Homes from Victoria Park to Coral Ridge run units hard through hurricane season, and a pan that overflows sends water straight onto the floor, into ceiling insulation, or down through ductwork below the unit.

The Float Switch And Overflow

Most AC units built or serviced recently carry a float switch inside the drain pan or condensate line. It is meant to shut the unit off the moment water rises too high, before the pan overflows onto the floor. A switch that is stuck, unwired, or missing lets the leak run unchecked.

Older units near Sistrunk or in condos along the Intracoastal sometimes lack this switch entirely, or it was bypassed during a past repair. Without it, a clogged line has no backup, and the first sign of trouble is water stains on a ceiling below an attic unit or a puddle near a closet unit.

Other Signs Worth Checking

Sweating ductwork is a separate but related problem. Poorly insulated ducts running through a hot attic near Oakland Park or Wilton Manors collect condensation on the outside of the metal, and that moisture drips down as if the unit itself were leaking, even with a clear line.

A vacuum run through the condensate line by a licensed pro often clears a clog in minutes, but the line, pan, and float switch all need checking together. Fixing one part while another stays broken means the same puddle shows up again the next humid week.