Why Is My AC Spitting Out Water? | Understanding and Fixing the Issue

When your air conditioner starts spitting out water, it’s more than just an inconvenience it’s a sign that something’s wrong. Whether you’re dealing with AC water dripping onto your floors or water leaking inside AC units, this issue can lead to costly damage if ignored. Understanding the root causes, from a leaking air conditioner to internal malfunctions, is the first step toward resolving the problem.

In this guide, we’ll explore why is my AC spitting out water, how to address it, and when to call professionals like Derks Plumbing to safeguard your home.

Common Reasons Your AC Is Spitting Out Water

Air conditioners remove humidity from the air, which turns into condensation. Normally, this water drains safely outside. However, when components fail or become blocked, you’ll notice water leaking inside AC systems or pooling around the unit. Below, we break down the most frequent causes of AC water dripping and how they disrupt your system.

1. Clogged Condensate Drain Line

The condensate drain line is responsible for funneling moisture away from your AC unit. Over time, algae, mold, or debris can clog this line, causing water coming out of AC systems to back up. A fully blocked drain line forces water to overflow into your home, often through the AC’s indoor unit. You might notice damp walls, musty odors, or visible AC water dripping near the air handler.

To prevent clogs, annual flushing of the drain line with a vinegar solution is recommended. For severe blockages, professional drain cleaning ensures the line is fully cleared.

2. Dirty Air Filters

A dirty air filter restricts airflow over the evaporator coils, causing them to freeze. When the ice melts, the excess water overwhelms the drain pan, leading to water leaking inside AC units. If your filter hasn’t been replaced in over three months, it’s likely contributing to the problem.

Regularly replacing filters (every 1–3 months) maintains airflow and prevents coil freezing. This simple step can stop AC water dripping and improve your system’s efficiency.

3. Low Refrigerant Levels

Refrigerant is essential for cooling your home. When levels are low, evaporator coils can freeze, similar to the issue caused by dirty filters. As the ice thaws, it creates excess moisture, resulting in water coming out of AC vents or the unit itself. Low refrigerant often indicates a leak, which requires immediate professional repair to prevent further damage.

4. Damaged or Rusted Drain Pan

The drain pan sits beneath the evaporator coils to catch condensation. Over time, cracks or rust can develop, causing water leaking inside AC systems. Older units are especially prone to pan deterioration. If water pools around the indoor unit, inspect the pan for visible damage.

Replacing a cracked drain pan is a straightforward fix, but improper installation can lead to recurring AC water dripping. Always hire a technician for precise replacements.

5. Improper Installation or Leveling

If your AC unit wasn’t installed correctly, it may not tilt toward the drain line as intended. This misalignment prevents proper drainage, forcing water coming out of AC units indoors. Similarly, outdoor units that aren’t level can cause AC water dripping near the compressor.

A professional HVAC technician can re-level the unit to ensure condensation flows outward.

6. Frozen Evaporator Coils

Besides dirty filters and low refrigerant, frozen coils can stem from poor ventilation or malfunctioning blower fans. When the ice melts, the sudden surge of water overwhelms the drain system, leading to water leaking inside AC components.

Thawing the coils and addressing the underlying cause (e.g., cleaning vents, repairing fans) is critical to stopping AC water dripping.

7. Broken Condensate Pump

In homes where gravity can’t move water away from the AC, a condensate pump is used. If this pump fails, water backs up into the system, causing water coming out of AC units. Listen for unusual noises from the pump, or check for standing water near the indoor unit.

How to Fix a Leaking Air Conditioner

While some issues require professional help, here’s how to address common causes of water leaking inside AC systems:

Unclog the Drain Line

Use a wet/dry vacuum to suction debris from the drain line’s outdoor opening. For tougher clogs, pour a mixture of vinegar and hot water to dissolve algae. Prevent future blockages with annual maintenance.

Replace Air Filters

Swap out dirty filters to restore airflow. This reduces strain on the evaporator coils and minimizes freezing.

Inspect the Drain Pan

Check for cracks or rust. If damaged, replace the pan promptly to avoid AC water dripping onto floors or walls.

Thaw Frozen Coils

Turn off the AC and let the coils thaw naturally. Once defrosted, identify the root cause (e.g., refrigerant leaks, dirty filters) to prevent recurrence.

Re-Level the Unit

Use a level tool to check the AC’s tilt. Adjust the positioning so condensation flows toward the drain line.

When to Call a Professional for a Leaking Air Conditioner

While DIY fixes work for minor issues, certain problems demand expertise:

• Refrigerant leaks: Handling refrigerant requires certification due to its toxicity.

• Electrical failures: Faulty wiring or broken pumps need skilled repair.

• Persistent clogs: Recurring drain line blockages may indicate deeper issues.

If water coming out of AC systems persists despite your efforts, contact Derks Plumbing. Our licensed technicians diagnose and resolve AC leaks quickly, protecting your home from water damage.

Preventing Future AC Water Leaks

• Schedule Annual Maintenance: Professional tune-ups catch issues like low refrigerant or worn drain pans early.

• Monitor Humidity Levels: Excess moisture strains your AC. Use a dehumidifier in humid climates.

• Upgrade Older Units: Aging systems are prone to leaks. Modern, energy-efficient models reduce risks.