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AC Leaking Water Inside
in Boynton Beach, FL
Your AC removes water from the air as it cools your home, and that water drains outside through a small pipe called the condensate drain line. In Boynton Beach's humid climate, an AC unit can pull out one to two gallons of water every hour on a hot day. When that drain gets blocked, water backs up and overflows, and in a home with drywall ceilings below the air handler, the damage shows up fast.
Quick Answer
AC units in Boynton Beach pull a tremendous amount of moisture out of the air because humidity here sits above 70 percent most of the year. That water has to drain somewhere, and when the drain line clogs or the pan cracks, it ends up on your floor or ceiling. The fix is clearing the drain line and checking the pan and float switch. Call (561) 200-8530 when you first see water because drywall and subfloor damage follow fast.
Telltale Signs
Warning Signs to Watch For
- Water puddle on the floor directly under the air handler
- Water stains or bubbling paint on the ceiling below an attic air handler
- The AC shuts itself off even though the thermostat is calling for cooling
- A musty or mildew smell coming from the vents
- The overflow drip pan under the air handler is full of standing water
- Visible mold around the air handler cabinet
Root Causes
What Causes AC Leaking Water Inside?
Clogged Condensate Drain Line
Algae and mold grow inside the drain line because there is always moisture and warmth present. Over time that growth restricts the line until it stops draining entirely. In Boynton Beach, the combination of year-round heat and high humidity means drain lines can clog in as little as three to four months without maintenance.
The Fix
Drain Line Flush and Algae Treatment
A technician uses a wet vacuum or nitrogen to clear the clog, then flushes the line with a diluted algaecide. Adding a condensate treatment tablet every few months keeps algae from rebuilding.
Cracked or Corroded Drain Pan
The drain pan sits under the evaporator coil to catch condensation before it reaches the line. In homes built before 1990 in areas like Lake Worth Estates, these pans are often original equipment and the plastic has become brittle and cracked over decades of thermal cycling. A cracked pan leaks even when the drain line is clear.
The Fix
Drain Pan Replacement
The old pan is removed and replaced with a new one sized to fit the air handler. A secondary float switch is installed in the overflow pan if one isn't already present so the system shuts off before water escapes.
Frozen Coil Thawing Rapidly
When an evaporator coil freezes due to low airflow or low refrigerant, it accumulates a thick layer of ice. When the system shuts off, all that ice melts at once and dumps more water than the drain pan or line can handle. This is common in Boynton Beach homes with older air handlers that haven't had coil cleanings in several years.
The Fix
Coil and Airflow Repair
The root cause of the freeze must be fixed first, whether that is a dirty coil, a blocked filter, or low refrigerant. Once corrected, the drain system is cleared so it can handle normal condensation going forward.
Self-Diagnosis
Which Cause Applies to You?
Check the signs you're observing to narrow down the likely root cause before your inspection.
| What You're Seeing | Clogged Condensate Drain Line | Cracked or Corroded Drain Pan | Frozen Coil Thawing Rapidly |
|---|---|---|---|
| Drain line has no flow when checked outside | |||
| Visible crack in the plastic drain pan | |||
| Ice found on the air handler before the leak started | |||
| Water overflows even right after drain is cleared | |||
| Drain line is full of black or green slime |
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