AC Leaking Water in Dallas–Fort Worth

An air conditioner is supposed to produce water — gallons of it a day. It is not supposed to put that water on your floor, your ceiling, or your insulation.

Cooling air also dehumidifies it. In a North Texas summer, a typical home's evaporator coil pulls five to twenty gallons of water out of the air per day, and all of it is supposed to run down the condensate drain and outside. A leak means that path is blocked, broken, or overwhelmed.

In DFW, most air handlers are in the attic — which means a drain problem doesn't show up as a puddle you notice, it shows up as a brown ring on a bedroom ceiling weeks after the leak started. Ceiling stains, damp insulation, or a musty smell near a supply vent all deserve a look the same week.

• Fast response — water damage compounds
• Drain line clearing and treatment
• Float switch and pan inspection
• Attic air handler specialists

Do This First

Turn the system off at the thermostat. It's the only way to stop producing more water, and every hour it runs adds to the damage. Then look for the drain pan under the air handler — if it's full, carefully vacuum or sponge it out so it doesn't overflow again while you wait for us.

If the ceiling below your attic unit is sagging or holding water, don't puncture it and don't stand under it. Call us and we'll handle it.

What Causes an AC Water Leak

Almost every leak we're called out for is one of these, and the first one accounts for the majority:

• A clogged condensate drain line — algae and biofilm build up in a warm, wet PVC pipe and eventually block it
• A rusted-through or cracked drain pan under an older air handler
• A disconnected or improperly sloped drain line that stopped carrying water downhill
• A frozen evaporator coil that thawed all at once and overwhelmed the pan
• A failed condensate pump, on systems that have to push water uphill
• A dirty coil dripping outside the pan instead of into it
• Missing or degraded insulation on the refrigerant line, so the line itself sweats onto the ceiling

The Float Switch Is a Feature, Not a Fault

If your system shut itself off and there's water in the pan, a float switch did its job. That safety switch is wired to kill the system when water backs up, precisely so you get an inconvenient warm house instead of a destroyed ceiling.

Don't bypass it and don't let anyone talk you into 'just jumping it out' to get cooling back. Clearing the drain fixes the actual problem, usually in a single visit.

Why DFW Drains Clog So Reliably

Long cooling seasons, high humidity coming off the Gulf, and 130–150° attics create close to perfect conditions for algae growth inside a condensate line. A drain that has never been serviced will eventually clog — it's a matter of when, not if.

It's also the cheapest failure on the system to prevent. A drain flush and treatment during a maintenance visit takes minutes and is included in our Comfort Club tune-ups.

What You Can Safely Check

1. Turn the system off — At the thermostat. This stops new water from being produced and is the first thing that limits damage.
2. Find the water — Check the drain pan under the indoor unit, and look at the ceiling directly below an attic air handler for staining or bulging.
3. Check the filter — A clogged filter causes coil freezing, and a coil that thaws all at once floods the pan. Replace it if it's dirty.
4. Look for the outside drip — Find the small PVC pipe near your outdoor unit or by a window. On a humid day a healthy system drips steadily from it. Nothing coming out points straight at a clog.

What NOT to Do

• Don't bypass the float switch to force the system back on — that switch is the only thing standing between a clog and a ruined ceiling.
• Don't pour bleach into the drain line. It corrodes the pan and metal fittings; a proper flush and treatment is safer.
• Don't ignore a ceiling stain because the drip stopped. Wet insulation and framing grow mold long after the visible water is gone.

AC Leaking Water — Frequently Asked Questions

Why is my AC leaking water all of a sudden?

Nearly always a clogged condensate drain. Algae builds up in the line over a season or two until it blocks completely, and the water backs up into the pan and over the edge. Clearing the line is a routine repair.

Is it safe to run my AC if it's leaking water?

No. Every hour it runs makes more water and more damage — especially with an attic air handler over finished ceilings. Turn it off at the thermostat and call.

Can I clear the condensate drain myself?

Sometimes a wet/dry vac on the outdoor end of the drain pulls the clog free. If that doesn't work, or if you can't find the line, or if there's already ceiling damage, stop — forcing it can disconnect fittings inside the attic and make it much worse.

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

Clearing and treating a drain line sits at the low end of our pricing. A rusted drain pan or a failed condensate pump costs more because there are parts involved. You'll have the exact number before we start.

Why did my AC shut itself off when it started leaking?

Your float switch worked. It's a safety device that cuts power when water backs up in the pan. Once the drain is cleared and the pan is dry, the system starts normally again.

Can a leaking AC cause mold?

Yes. Wet drywall, insulation, and framing in a warm attic are ideal for mold, and it can establish within a couple of days. That's the main reason we treat water leaks as urgent rather than routine.

Other AC Symptoms

AC Frozen Up / Iced Over · Weak Airflow from AC Vents · AC Making Loud Noises · AC Not Cooling

The Services That Fix It

AC Repair · HVAC Maintenance & Tune-Ups · Indoor Air Quality · All HVAC services

Water Leak Repair Across Dallas–Fort Worth

We handle this throughout the metroplex: Dallas, TX · Fort Worth, TX · Arlington, TX · Plano, TX · Irving, TX · Garland, TX · Frisco, TX · McKinney, TX · Richardson, TX · Mesquite, TX · Grand Prairie, TX · Carrollton, TX · Denton, TX · Lewisville, TX · Allen, TX · Sunnyvale, TX · Forney, TX · Terrell, TX · Rowlett, TX · Rockwall, TX · Flower Mound, TX · Southlake, TX · Grapevine, TX · Keller, TX · Coppell, TX · Colleyville, TX · North Richland Hills, TX · Hurst, TX · Euless, TX · Bedford, TX · The Colony, TX · Little Elm, TX · Prosper, TX · Celina, TX · Wylie, TX. See every area we serve.

Absolute Comfort Mechanical HVAC — licensed, insured, family-owned, serving the Dallas–Fort Worth metroplex. Call 214-900-2533 for 24/7 AC repair, heating, cooling, and commercial refrigeration service.