If you live in Celina and your air conditioner has been running almost nonstop this week, you’re not imagining it. With the heat index pushing 110°, your AC isn’t just working hard, it’s working at the edge of what it was built to handle. And when a system runs that hard for that long, condensation has to go somewhere. Most of the time it drains away quietly. Sometimes it doesn’t, and that’s when a small drip turns into a ceiling stain, a warped floor, or a moldy patch you don’t find until it’s already spread.
Let’s talk about why this happens right now, specifically, and what you can check today before it becomes a bigger problem.
Why extreme heat causes AC condensation leaks
Every air conditioner pulls moisture out of the air as it cools your home. That moisture collects on the evaporator coil and is supposed to drain out through a condensate line to the outside. On a normal day, that system keeps up just fine.
But when the heat index hits triple digits, your AC runs longer cycles, more often, for more hours a day. That means more condensation being produced, more volume moving through that little drain line, and more chances for something to go wrong:
- The condensate line clogs. Algae, dust, and debris build up over time, and a heavy-use week is exactly when a partially clogged line finally backs up all the way.
- The drain pan overflows. Pans crack, rust, or simply weren’t sized for this much continuous output, so the overflow switch either fails or the water finds a way around it.
- Insulation sweats. Ductwork and lines running through hot attic space can develop condensation on the outside of the pipe, not just inside it, especially when the temperature swing between attic and duct is extreme.
Any one of these can send water into a ceiling, a wall cavity, or a closet floor, often above the AC closet or in the attic, where nobody’s looking every day.
Signs to check today, not next week
None of these take more than a few minutes:
- A ceiling stain, even a faint yellow or brown ring, especially under or near an attic unit
- A musty smell in a hallway or closet that wasn’t there before this heat wave
- Soft or spongy drywall anywhere below or beside the AC unit
- Standing water or a full drain pan if your unit is in a closet or attic you can access
- Your AC running constantly but the house not feeling as cool as it should
If you catch any of these early, you’re often looking at a fix, not a disaster. That’s the whole point of checking now while it’s still small.
Why “it looks dry” doesn’t mean it’s dry
Here’s the part people miss most: the surface of drywall or flooring can look and feel dry to the touch while the material underneath is still holding water. Drywall, subfloor, and insulation soak up moisture and hold onto it, and that hidden moisture is exactly where mold gets its foothold, usually within 24 to 48 hours in this kind of heat and humidity.
That’s the honest, sometimes uncomfortable truth about water damage. It’s rarely as simple as “wipe it up and move on.” The real question isn’t whether the surface is dry, it’s whether the structure underneath is.
What to do if you find a leak
Turn off the AC unit if you can safely do so, and put a towel or shallow container under any visible drip. Then get eyes on it, either yours or a professional’s, sooner rather than later. Day one is about stabilizing things: getting standing water out, keeping air moving, and figuring out how far the moisture actually traveled before you decide what needs to be repaired.
I can’t promise it won’t be an inconvenience to sort out. But I can promise to make it as least disruptive as possible, and to be straight with you about what’s actually needed and what isn’t.
If you’re in Celina or anywhere in North Texas right now
If you’re seeing any of these signs, or you just want a second set of eyes before it becomes something worse, give Merlene Mitigation a call or shoot a text. Josh personally handles inspections, so you’re talking to the person who’ll actually be looking at your home, not a call center. Being a small, local operation means lower overhead and fair prices, and it means one accountable person seeing your job through from the first look to the last fan.
And if nothing’s wrong today, good. Bookmark our free guide, The First 24 Hours After Water Damage, so if a leak ever does show up, you already know exactly what to do before help arrives.
-Ally
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