How to Fix AC Leaks: Your Guide to Stopping Water from Dripping Inside

We’ve all been there—a hot summer day, and your air conditioner is supposed to be your best friend, but instead, it’s leaking water inside your home. It’s frustrating, inconvenient, and can lead to water damage if not addressed promptly. But don’t worry, fixing an AC leak isn’t as daunting as it might seem. With a bit of knowledge and some basic tools, you can stop that annoying drip and get your AC back to keeping you cool and dry.

Why Is My AC Leaking?

Before diving into how to fix AC leaks, it’s essential to understand why your AC might be leaking in the first place. Typically, air conditioners leak water due to:

1. Clogged Condensate Drain Line: The most common cause of water leaks is a clogged condensate drain line. Over time, dust, dirt, and debris can build up in the line, preventing water from draining correctly.

2. Dirty Air Filters: When the air filters are dirty, they restrict airflow, causing the evaporator coil to freeze. As the ice melts, it can overflow the drain pan, leading to water leaks.

3. Low Refrigerant Levels: Low refrigerant levels can cause the evaporator coil to freeze, and as it thaws, water can leak inside.

4. Improper Installation: If your AC unit wasn’t installed correctly, it might not be level, causing water to flow the wrong way.

5. Broken Condensate Pump: If your AC unit is in the basement or a low-lying area, it might have a condensate pump to help move water. If this pump breaks, water can back up and leak inside.

How to Fix AC When It’s Leaking Water Inside?

Now that you know the potential causes, let’s get into how to fix your AC when it’s leaking water inside. Follow these steps to troubleshoot and solve the issue.

1. Turn Off the AC Unit

Before you begin any repairs, make sure to turn off your AC unit. This is crucial for your safety and to prevent any further damage to the system. If you have a central air conditioning system, you’ll likely find the power switch near the furnace or air handler. For window units, simply unplug them from the wall.

2. Check and Clean the Condensate Drain Line

As mentioned earlier, a clogged condensate drain line is a common culprit. Here’s how to fix it:

• Locate the Drain Line: Find the drain line near the indoor unit. It usually looks like a PVC pipe.

• Clear the Blockage: Use a wet/dry vacuum to suck out the blockage. You can also use a plumber’s snake to dislodge the clog. If you notice any algae or mold, consider pouring a mixture of bleach and water down the drain line to clean it thoroughly.

• Test the Drain Line: After clearing the blockage, pour some water into the condensate pan to ensure it flows freely through the drain line.

3. Replace or Clean Air Filters

Dirty air filters can restrict airflow and cause various issues, including leaks. Check your air filters and replace them if they’re dirty. It’s a good idea to replace or clean your filters every 1-3 months, depending on usage.

• Pro Tip: If you have pets or live in a dusty area, you might need to change your filters more often.

4. Check for Refrigerant Leaks

If your refrigerant levels are low, your AC unit might freeze up and leak water as it thaws. Here’s what to do:

• Call a Professional: Refrigerant issues are best handled by a licensed HVAC technician. They can check for leaks, recharge your system, and ensure everything is working correctly.

• Don’t DIY: Handling refrigerant without the proper training and equipment can be dangerous and is illegal in many areas.

5. Inspect the Drain Pan

The drain pan catches any water that drips off the evaporator coil. If the pan is cracked or rusted, it won’t hold water properly, leading to leaks.

• Check for Damage: Inspect the drain pan for any cracks, holes, or rust spots. If you find any damage, you’ll need to replace the pan.

• Temporary Fix: If you can’t replace the pan immediately, use a waterproof sealant as a temporary fix. However, this is only a short-term solution, and you should replace the pan as soon as possible.

6. Ensure Proper Installation

If your AC unit isn’t level, water may not drain correctly, leading to leaks. Here’s how to fix it:

• Check the Level: Use a carpenter’s level to check if your AC unit is sitting flat. If it’s not, you may need to adjust the unit or its mounting brackets.

• Call a Professional: If the installation is the issue, it’s best to call a professional to make sure your AC is correctly installed and leveled.

How to Stop AC Unit from Leaking Water from a Wall Unit?

Wall-mounted AC units are convenient, but they can also leak if not maintained correctly. Here’s how to fix a water leak from a wall AC:

1. Clean the Drainage System

Wall AC units have a small drainage hole at the back, which can get clogged with dirt and debris. Regularly clean this hole to ensure water flows out freely.

• Use a Small Brush: A small brush or a can of compressed air can help clear the drainage hole.

2. Check the Tilt

Your wall AC should be slightly tilted backward to allow water to drain outside. If it’s level or tilting forward, water will leak inside.

• Adjust the Tilt: Use shims or adjust the mounting bracket to ensure your AC is properly tilted.

Preventive Maintenance Tips

To avoid future leaks, regular maintenance of your AC unit is crucial. Here are some tips:

• Schedule Annual Checkups: Have a professional HVAC technician inspect your system once a year to catch any potential issues early.

• Keep the Area Clean: Keep the area around your AC unit free from dust, dirt, and debris to prevent clogs.

• Replace Filters Regularly: As mentioned earlier, regularly replacing or cleaning your filters can prevent many common AC problems.

Keep Your AC Running Smoothly

Dealing with a leaking AC can be a hassle, but with the right approach, it’s something you can often fix yourself. However, if you’ve tried these steps and your AC is still leaking, or if you’re unsure about tackling the repairs on your own, it’s time to call in the professionals. At Heritage Air Texas, we specialize in keeping your home cool and dry. Contact us today for expert AC repair and maintenance services that will keep your system running smoothly all year round.

Water leaking from your AC doesn’t have to be a cause for panic. By understanding the common causes of leaks and knowing how to fix them, you can protect your home from water damage and ensure your AC unit keeps you comfortable. Whether it’s a clogged drain line, dirty filters, or something more serious, addressing the issue promptly will save you time, money, and stress in the long run. Remember, regular maintenance is key to preventing future leaks, so keep your AC in top shape with these simple tips.