Why your AC is leaking water inside the house

Water dripping from a ceiling vent, pooling around the air handler, or staining the garage drywall sends most homeowners into a panic — it looks like a plumbing disaster. Here's the reassuring truth: in Florida, an AC leaking water inside is almost always a clogged condensate drain line, and it's one of the cheapest, fastest repairs on the menu.

Why this happens to nearly every Florida AC eventually

Your air conditioner doesn't just cool the air — it dehumidifies it. On a humid Sumter County afternoon, a residential system can pull 5 to 20 gallons of water out of your air per day. All of it exits through a small PVC drain line. Warm, damp, dark pipe plus Florida's ambient biology equals algae and sludge — and once the line clogs, that water backs up into the drain pan and then into your home.

What to do right now

  1. Turn the AC off at the thermostat. Every minute it runs, it makes more water.
  2. Soak up standing water around the air handler to protect flooring and drywall.
  3. Check the drain pan (the shallow tray under the indoor unit). Full pan = clogged line, nearly every time.
  4. If you're comfortable with it: find the drain line's exterior outlet (a PVC stub near the outdoor unit) and pull the clog out with a wet/dry vacuum sealed over the pipe for 60 seconds. This clears a fair share of clogs.
Many Florida systems have a float switch that shuts the AC off automatically when the pan fills — so a mysteriously dead AC and a water leak are often the same problem. If your system won't turn on at all, check the pan first.

What it costs to fix

A professional drain line clearing and treatment typically runs $95–$225 in our area. If the drain pan itself has rusted through (common on systems 10+ years old), pan replacement adds more. The expensive part of this problem is never the AC repair — it's the drywall, flooring, and mold remediation if the leak runs for days unnoticed. See our full Wildwood AC repair cost guide for context on other repairs.

Preventing the next clog

Once a season, pour a cup of distilled white vinegar into the drain line's access tee near the air handler — it kills the algae before it becomes a blockage. It's a 60-second habit that prevents the single most common AC service call in Florida. This is also standard practice in a seasonal tune-up, along with the checks that catch bigger problems early.

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Frequently asked questions

Is water leaking from my AC dangerous?

The water itself is just condensation — clean water pulled from your air. The danger is what it does over time: soaked drywall, warped flooring, and mold growth if it goes unnoticed. Shut the system off and address it the same day.

How much does it cost to fix an AC leaking water?

In the Wildwood area, professional drain line clearing typically runs $95–$225. A rusted-through drain pan or a float switch replacement adds to that. It's one of the least expensive AC repairs — the costly version is the water damage from waiting.

Can I keep running my AC if it's leaking a little?

It's not worth it. The leak won't fix itself, every hour of runtime produces more water, and if the unit sits above living space (attic air handlers especially), the ceiling below is absorbing it. Turn it off and get the line cleared.

Why does my AC leak water only sometimes?

A partial clog lets water drain slowly — fine during light runtime, overwhelmed during heavy afternoon runtime when the system is pulling maximum humidity. Intermittent leaking is an early warning that a full clog is coming.