If your AC has been running nonstop today, you’re not imagining it. With the heat index hitting 107° and a Heat Advisory in effect through tonight, every AC system in Pilot Point is working as hard as it’s going to work all year. And a hardworking AC produces a lot of condensation, all of which has to go somewhere.
Most of the time it drains outside, quietly, and nobody thinks twice about it. But on days like today, that drain line is exactly where small problems turn into a wet ceiling, a warped floor, or a moldy closet by the weekend. Here’s what to check right now, while there’s still time to catch it.
Why heat index days are peak leak days
Your AC doesn’t just cool air, it pulls moisture out of it. The hotter and more humid it is outside, the harder your system runs, and the more condensation it produces per hour. On a mild day, a slightly clogged drain line might keep up just fine. On a 107° heat index day, that same clog can back up in a matter of hours.
That’s the pattern we see every summer across North Texas: AC failures and overflow leaks cluster hard on the worst heat days, not the mild ones. Today is one of those days.
The 5-minute checklist
- Check the drain pan under your indoor unit (attic or closet). Any standing water, even a little, means the primary drain isn’t keeping up.
- Look at the PVC drain line outside your house. It should be dripping steadily. If it’s bone dry while your AC is clearly running, that can mean it’s clogged and backing up somewhere you can’t see.
- Find the secondary drain line or float switch, if your system has one. If water is coming out of a secondary line, that’s your system telling you the primary is already backed up.
- Check the ceiling below or around your attic unit for any new staining, soft spots, or discoloration.
- Feel around the base of a closet AC unit for dampness in the carpet or flooring.
If you find standing water in the pan or a stained ceiling, that’s your sign something’s already backing up, not just running hard.
What actually causes the clog
Almost always it’s algae or mold growth inside the drain line itself, condensation is basically distilled water sitting in a dark, damp pipe all summer, which is exactly the environment things like to grow in. Dust and debris build on top of that and eventually block the line enough that water has nowhere to go but back into the pan, and from there, into your ceiling or floor.
If you already see water
Turn the AC off at the thermostat if you see active water intrusion, that stops adding more moisture while you sort out the drain issue. Don’t run a wet-vac over it and call it handled, though. Surface water is easy to see. What soaks into drywall, insulation, and subfloor is not, and that’s where hidden mold risk actually lives. If it looked dry within a day but the ceiling was ever wet, it’s worth having someone check the moisture level underneath, not just the surface.
You’re not overreacting
I say this every summer and I’ll keep saying it: a little water today is so much cheaper and easier to deal with than the same water three weeks from now, once it’s had time to work into the structure and start growing something you don’t want in your house. On heat advisory days especially, it’s worth the five minutes to go check.
We’re here if you need us
Merlene Mitigation is based right here in Pilot Point, and we cover the surrounding North Texas towns too. If you’ve found water damage from an AC overflow, or you’re just not sure what you’re looking at, give us a call or shoot a text, whichever’s easier for you. Josh personally handles inspections and is typically on-site within the hour for emergencies. It’s a one-man operation with low overhead, which means fair prices and one accountable person seeing the whole job through, not a stranger dispatched from a call center.
And if nothing’s wrong today but you want to be ready before it is, our free guide, The First 24 Hours After Water Damage, walks through exactly what to do in those first critical hours. Worth five minutes now so you’re not guessing later.
Stay cool out there, Pilot Point.
-Ally
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