Why is my AC dripping water inside my house?

The most common cause is a clogged condensate drain line — algae growth blocks the line, causing the drain pan to overflow. Other causes include a cracked drain pan, a frozen coil thawing, or a disconnected drain line.

Is a leaking AC an emergency?

It's urgent but not a safety emergency. Turn the system off to stop the water flow, place towels to prevent water damage, and call us for same-day service. Water damage and mold can develop within 24-48 hours.

How do I prevent my AC condensate drain from clogging?

Pour a cup of white vinegar down the drain line every 1-3 months during cooling season, and have the drain line flushed and treated with algae inhibitor during annual AC maintenance.

Why is my AC dripping water inside my house?

The most common cause is a clogged condensate drain line — algae growth blocks the line, causing the drain pan to overflow. Other causes include a cracked drain pan, a frozen coil thawing, or a disconnected drain line.

Is a leaking AC an emergency?

It's urgent but not a safety emergency. Turn the system off to stop the water flow, place towels to prevent water damage, and call us for same-day service. Water damage and mold can develop within 24-48 hours.

How do I prevent my AC condensate drain from clogging?

Pour a cup of white vinegar down the drain line every 1-3 months during cooling season, and have the drain line flushed and treated with algae inhibitor during annual AC maintenance.

AC Leaking Water

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Professional AC Leaking Water in Asheville & Western NC

Water leaking from your air conditioning system can cause expensive damage to floors, ceilings, and walls — and mold can start growing within 24-48 hours.

What Causes an AC to Leak Water

Your AC removes humidity from the air as it cools — that moisture drips into a drain pan and flows through a condensate drain line to the outside. When that process gets disrupted, water ends up in your home. The most common causes include a clogged condensate drain line (algae and biofilm buildup is the #1 cause), a cracked or rusted drain pan, a frozen evaporator coil that's thawing and overwhelming the drain, a disconnected drain line, or a failed condensate pump.

Quick Things You Can Check

Locate the condensate drain line — it's usually a PVC pipe running from the air handler to the outside of your home. If no water is dripping from the end during operation, the line is probably clogged. Turn the system off to stop the water flow. Check the air filter — a clogged filter can cause the coil to freeze and create excess water when it thaws. Place towels to prevent further damage.

When This Becomes a Serious Problem

Water damage to drywall, flooring, and ceilings is expensive to repair, and mold remediation costs even more. If the leak is caused by a frozen coil rather than a clogged drain, the underlying refrigerant or airflow problem will cause the leak to return. If you're also seeing reduced cooling or your AC not cooling at all, both problems share the same root cause.

When to Call for AC Repair in Asheville

If water is actively leaking and you can't clear the drain, call for same-day service. Quality Comfort provides AC repair in Asheville — we clear drain lines, replace drain pans, and treat the system with algae inhibitor to prevent future clogs.