How To Fix An Air Conditioner Leaking Water Inside – A Comprehensive Guide

Are you experiencing the frustration of an air conditioner leaking water inside your home? This can be a common issue that homeowners face, but fortunately, there are ways to address and fix it. In this comprehensive guide, we will walk you through the process of troubleshooting and resolving this problem.

I also faced this issue By following the steps outlined below, you can restore your air conditioner’s functionality and ensure a comfortable indoor environment. Let’s dive in!

Understanding Why Your Air Conditioner Leaks Water Inside

Condensate Drainage System Overview

To comprehend why your air conditioner is leaking water inside, it’s crucial to understand the condensate drainage system. Your AC cools the air by removing heat and humidity, which results in condensation forming on the evaporator coil.

This moisture is collected and drained through a system of pipes or a condensate pump. When this system encounters an issue, water can accumulate and leak inside your home.

Common Causes of AC Water Leakage

To diagnose and fix the issue, it’s essential to identify the underlying cause of the water leakage. Here are some common culprits:

  1. Clogged Condensate Drain Line:
    • Debris, mold, or algae can block the drain line, causing water backup.
    • Solution: Clear the drain line using a wet/dry vacuum or a thin, flexible brush.
  2. Disconnected or Damaged Drain Line:
    • Over time, the drain line may become disconnected or develop cracks, leading to water leakage.
    • Solution: Inspect the drain line for damage and reconnect or replace it if necessary.

Steps to Fix an Air Conditioner Leaking Water Inside

Now that you have an understanding of the potential causes, let’s explore the steps to fix your air conditioner’s water leakage issue.

Step 1: Turn Off the Air Conditioner

Before you begin any troubleshooting or repair work, ensure your air conditioner is turned off. This prevents any electrical accidents or further damage.

Step 2: Locate the Drain Line

Locate the drain line by referring to your air conditioner’s manual or following the pipes connected to the unit. The drain line is usually made of PVC or a similar material.

Step 3: Inspect the Drain Line

Carefully inspect the drain line for any visible clogs, disconnections, or damage. If you notice any issues, proceed to the appropriate solution.

Step 4: Clearing a Clogged Drain Line

If the drain line is clogged, follow these steps to clear it:

  1. First of all, turn off the air conditioner and disconnect the power supply.
  2. Locate the access point or cleanout fitting on the drain line. It is typically near the indoor air handler or in the basement.
  3. Remove the cap or fitting, and using a wet/dry vacuum, apply suction to remove the clog.
  4. Alternatively, use a thin, flexible brush to gently dislodge and remove the debris.
  5. After clearing the clog, flush the drain line with a mixture of equal parts bleach and water to prevent future blockages.
  6. Reattach the cap or fitting and restore power to the air conditioner.

Step 5: Repairing a Disconnected or Damaged Drain Line

If you find that the drain line is disconnected or damaged, follow these steps to repair it:

  1. First of all, you need to turn off the air conditioner and disconnect the power supply. 2. Carefully cut out the damaged section of the drain line using a pipe cutter or a hacksaw.
  1. Obtain a replacement PVC pipe or coupling that matches the diameter of the existing drain line.
  2. Clean the ends of the existing drain line and the replacement pipe or coupling with a PVC cleaner.
  3. Apply PVC cement to both ends and firmly connect them together, ensuring a secure and watertight seal.
  4. Allow the cement to dry as per the manufacturer’s instructions before restoring power to the air conditioner.

Step 6: Check the Condensate Pan

While troubleshooting the water leakage, it’s essential to inspect the condensate pan. Over time, the pan can develop cracks or become corroded, leading to water seepage. If you identify any damage, consider replacing the pan to prevent future leaks.

Step 7: Clean the Evaporator Coil

A dirty or clogged evaporator coil can contribute to water leakage. To clean the coil:

  1. Turn off the air conditioner and disconnect the power supply.
  2. Remove the access panel to gain access to the evaporator coil.
  3. Gently brush away any visible dust or debris using a soft brush or a vacuum cleaner with a brush attachment.
  4. For stubborn dirt or grime, use a commercially available coil cleaner following the manufacturer’s instructions.
  5. Allow the coil to dry completely before reassembling the unit and restoring power.

Preventive Measures to Avoid Air Conditioner Water Leaks

To minimize the risk of future water leakage, consider implementing these preventive measures:

  1. Regular Maintenance:
    • Schedule routine maintenance for your air conditioner, including cleaning and inspecting the condensate drainage system.
    • A professional HVAC technician can perform thorough maintenance, ensuring optimal performance and early detection of potential issues.
  2. Clean the Air Filter:
    • A dirty air filter restricts airflow, causing the evaporator coil to freeze and potentially lead to water leakage.
    • Clean or replace the air filter regularly, following the manufacturer’s recommendations.
  3. Clear Surrounding Drainage:
    • Ensure that the area around your air conditioner’s outdoor unit has proper drainage, allowing water to flow away from the unit effectively.
    • Remove any debris, leaves, or obstructions that could impede drainage.
  4. Consider a Condensate Pump:
    • If your air conditioner is located in a basement or an area below ground level, installing a condensate pump can help remove water efficiently.


Q1: Can a blocked condensate drain line cause water to leak inside the house?

Yes, a clogged drain line can lead to water backup and subsequent leakage inside your home. Regularly cleaning and maintaining the drain line helps prevent this issue.

Q2: Why is my air conditioner leaking water inside, but it’s still cooling?

Even if your air conditioner is still cooling, water leakage indicates an underlying problem that requires attention. Ignoring it can lead to further damage or reduced efficiency.

Q3: Can I fix an air conditioner water leak myself, or should I hire a professional?

Depending on the complexity of the issue, you can attempt to fix the water leak yourself. However, if you are unsure or uncomfortable with DIY repairs, it’s recommended to consult a professional HVAC technician.

Also read: How to Fix Air Conditioner Leaking Water Inside Car? A Comprehensive Guide


An air conditioner leaking water inside your home can be a frustrating issue, but it is solvable. By following the step-by-step instructions outlined in this guide, you can identify the cause of the leak and effectively fix the problem.

Remember to conduct regular maintenance, clean the drain line, and keep the evaporator coil and condensate pan in good condition to prevent future water leakage. If you encounter any difficulties or are unsure about the repair process, it’s always wise to seek assistance from a professional HVAC technician.

By addressing the issue promptly and implementing preventive measures, you can ensure that your air conditioner operates efficiently, keeping your home cool and comfortable without the inconvenience of water leakage.

Remember, regular maintenance and proper care are key to the longevity and optimal performance of your air conditioning system.

So, if you find yourself dealing with an air conditioner leaking water inside, don’t panic. Follow the steps provided in this guide, take the necessary precautions, and enjoy a well-functioning and leak-free cooling system.

Now that you have a comprehensive understanding of how to fix an air conditioner leaking water inside, you can confidently tackle the issue and restore the comfort of your home. Stay cool and worry-free!

Talha Hanjra

Hi! I'm Talha Hanjra. I have a natural affinity for cutting-edge technological devices, and I enjoy finding solutions to their difficulties. I'll tell you how to fix various outdated gadgets and where to buy the best products. My research and experience will be of tremendous use to you.

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