An AC drain overflow can soak your attic insulation, ceiling, and walls before you see a single drip. We remove the water, dry the structure, and repair the damage. Call 24/7.
In North Texas, the air conditioner works hard for much of the year, and every hour it runs removes moisture from the air. That water is meant to drain out through a small condensate line. When the line clogs or the coil freezes, the water goes somewhere else: the drain pan, the attic floor, or the ceiling below. This page covers how to stop an AC leak, why the damage is often hidden, and how cleanup works. An HVAC technician fixes the system; we handle the water damage.
See our first 24 hours after water damage guide for the rest of the day.
| Cause | What happens | Who fixes it |
|---|---|---|
| Clogged condensate drain line | Algae or debris blocks the line and water backs up into the pan | HVAC technician |
| Frozen evaporator coil | Ice builds up, then melts faster than the pan can handle | HVAC technician (airflow or refrigerant issue) |
| Cracked or rusted drain pan | Water escapes through the pan itself | HVAC technician |
| Dirty air filter | Reduced airflow leads to a frozen coil | Homeowner replaces it |
| Failed or missing float switch | The system keeps running when the pan is full | HVAC technician |
Your AC may be leaking even if the unit looks dry. Read more in our blog post about AC leaking water in Frisco.
Many Frisco homes have the air handler in the attic. A clogged line there sends water over the pan, onto the insulation, and down through the ceiling drywall. The first sign is often a stain or a bubble in the paint. If that is what you see, read our guides on water bubbles on the ceiling and ceiling leak repair in Frisco.
Water spreads across the floor, into the baseboards, and into the walls behind the closet. Carpeting and padding near the unit often hold moisture longer than expected.
A slow drip inside a wall cavity or above a ceiling can run for weeks. Our article on hidden water damage signs lists what to watch for, including musty smells and discolored drywall.
AC leaks add moisture to enclosed spaces such as attics and closets where air barely circulates. Wet insulation and drywall can start supporting mold in a day or two. Read mold after water damage in Frisco and mold prevention in attics, garages, and closets. If growth is already visible, our mold remediation service can help. Water that has sat in the system can also affect ductwork and equipment, covered in HVAC problems after water damage.
Condensate can carry algae or bacteria, so it is not always as clean as it looks. Our water damage categories page explains how this affects cleanup.
Turn the AC off, then call. We will find the wet areas and begin drying before the damage spreads.
Coverage depends on how the leak happened. A sudden failure that floods a ceiling is more likely to be treated as covered damage than a drain line that overflowed repeatedly over time. The HVAC repair itself is usually not covered, but resulting damage to ceilings, insulation, and floors may be. Record dates, take photos, and keep invoices from your HVAC technician, since they can show the cause. Our Texas water damage insurance claim guide and restoration cost guide for Frisco help you prepare.
AC leaks are one of several appliance-related sources. See appliance water damage in Frisco for others.
If you are unsure whether the water is from your AC or from the plumbing, these city resources can help you rule out a utility-side issue:
We serve Frisco neighborhoods and the nearby cities of Plano, Allen, McKinney, and Prosper.
The most common cause is a clogged condensate drain line. Other causes include a frozen evaporator coil that melts and overflows, a cracked or overfilled drain pan, a dirty air filter, and a failed float switch.
No. Turn the system off at the thermostat and the breaker. Running it can keep producing condensate that has nowhere to go, and a frozen coil can be damaged further.
Yes. Water from an overflowing drain pan in the attic soaks insulation and the ceiling drywall below, and the damage may show up as stains or bulging before the leak is found.
Sudden and accidental discharge is often covered for the resulting damage. Leaks tied to long-term neglect or gradual seepage may be excluded, and the HVAC repair itself is typically not covered. Check your policy with your insurer.
Yes. Wet insulation and drywall in an attic or closet can support mold growth within 24 to 48 hours, especially where air moves poorly.
