Water Spitting From Air Conditioner

Introduction

Is your air conditioner spitting water instead of just cool air? This is a common problem, and while it might seem minor at first, it can lead to bigger issues like mold growth, water damage to your walls, and even damage to your AC unit itself. It usually happens when the weather is very humid, or if your AC unit hasn’t been properly maintained. Addressing this quickly can save you money and headaches down the road.

Common Causes of Water Spitting From Air Conditioner

Here are some reasons why your air conditioner might be spitting water:

Clogged Air Filter: A dirty filter restricts airflow, causing the evaporator coil to get too cold and freeze. When the ice melts, it overwhelms the drainage system.
Dirty Evaporator Coil: Similar to a dirty filter, a dirty evaporator coil can also freeze up.
Blocked Drain Line: Condensation from the cooling process needs to drain away. A blocked drain line prevents this, causing water to back up and spill out.
Low Refrigerant Levels: Low refrigerant can cause the evaporator coil to overcool and freeze, leading to melting water problems.
Incorrect Installation Angle: If your AC unit isn’t installed level, water might not drain properly.
Damaged Drain Pan: The drain pan collects condensation. If it’s cracked or damaged, it will leak.
High Humidity: Very humid weather can simply produce more condensation than the system is designed to handle, particularly in older units.
Frozen Coil: A coil that consistently freezes will cause excess water when it thaws.

Symptoms Checklist

Check for these signs to confirm the issue:

Water droplets or spitting water coming from the AC vent.
Water stains on the wall or ceiling near the AC unit.
A musty or moldy smell coming from the AC unit.
The AC unit is running but not cooling as effectively as it used to.
Visible ice buildup on the evaporator coil (you might need to remove a panel to see this).

How to Fix Water Spitting From Air Conditioner Step-by-Step Guide

Heres how to troubleshoot the issue:

Turn Off the AC: Before you start, turn off your air conditioner at the thermostat and the breaker. This is for your safety.
Check the Air Filter: Remove the air filter and inspect it. If it’s dirty, replace it with a new one. A clean air filter is crucial for proper airflow.
Inspect the Evaporator Coil: Locate the evaporator coil (usually behind the air filter). Look for ice buildup or excessive dirt. If iced, allow it to thaw completely.
Clean the Evaporator Coil: Use a fin comb (available at hardware stores) to gently straighten any bent fins. Then, use a coil cleaner spray to remove dirt and debris. Follow the product instructions.
Locate the Drain Line: The drain line is usually a PVC pipe that exits the indoor unit and leads outside or to a drain.
Check for Clogs: Carefully detach the drain line (if possible) and check for clogs. You can use a wet/dry vacuum to suck out any debris.
Flush the Drain Line: Pour a cup of vinegar or a drain line cleaner (specifically designed for AC units) into the drain line opening. Let it sit for about 30 minutes, then flush with water.
Inspect the Drain Pan: Locate the drain pan under the indoor unit. Check for cracks or damage. Ensure its properly positioned to catch water.
Level the AC Unit: Use a level to make sure the indoor unit is level. If not, shim it until it is. This is important for proper drainage.
Run the AC and Observe: Turn the AC back on and observe if the water spitting has stopped. Monitor the drain line to ensure water is draining properly.
Check for Refrigerant Leaks (Visual Inspection Only): Look for oily residue or ice buildup on the refrigerant lines. If you suspect a leak, this requires a professional.
Monitor for Further Issues: Keep an eye on your AC unit for the next few days to ensure the problem is resolved.

Fix the Issue Without Buying Parts

Before spending money, try these free methods:

Reset Your AC: Turn off the AC at the breaker for 10-15 minutes, then turn it back on. This can sometimes reset the system and resolve minor issues.
Regular Cleaning: Clean your air filter monthly and the evaporator coil at least twice a year.
Check for Obstructions: Make sure nothing is blocking the airflow around your outdoor unit.
Seasonal Maintenance: Perform a basic inspection of your AC unit before each cooling season.

When Replacement Might Be Necessary

If youve tried the above steps and the water spitting persists, it might be time to consider these replacements:

Drain Pan Replacement: If the drain pan is cracked or damaged (Cost: $30 – $100).
Drain Line Replacement: If the drain line is severely damaged or corroded (Cost: $10 – $50).
Refrigerant Recharge (Professional Service): If you suspect a refrigerant leak (Cost: $150 – $500 depending on the leak and refrigerant type).
In extreme cases, the entire AC unit may need replacement: (Cost: $3,000 – $7,000).

Commonly failing parts include the drain pan, the drain line and refrigerant lines.

Safety Warning

Keep these safety tips in mind:

Always turn off the power to the AC unit before performing any maintenance or repairs.
Be careful when working with electrical components.
Avoid getting water on electrical parts.
If you are not comfortable performing any of these tasks, call a qualified HVAC technician.
Wear gloves and eye protection when cleaning the evaporator coil or drain line.
Be careful when using ladders to reach the AC unit.

Tools You May Need

Here’s a basic tool list:

Screwdriver (Phillips and flathead)
Wet/dry vacuum
Fin comb
Coil cleaner spray
Level
Gloves
Eye protection

FAQ

Here are some frequently asked questions:

Q: How often should I clean my AC filter? A: At least every month, or more often if you have pets or allergies.
Q: Can I use bleach to clean the drain line? A: While some people use bleach, it’s generally not recommended as it can damage the drain line over time. Vinegar is a safer alternative.
Q: Why is my AC spitting water even after I cleaned the filter? A: There could be other issues, such as a clogged drain line or low refrigerant. Follow the steps above to troubleshoot further.
Q: How do I know if my AC has a refrigerant leak? A: Look for oily residue or ice buildup on the refrigerant lines. If you suspect a leak, call a professional.

Conclusion

Dealing with a water-spitting air conditioner can be frustrating, but with a little troubleshooting, you can often resolve the issue yourself. Remember to prioritize safety and take your time. If you’ve tried these steps and the problem persists, don’t hesitate to call a qualified HVAC technician. They have the expertise to diagnose and fix more complex issues, ensuring your AC unit is running efficiently and effectively.