How to Fix AC Leak in House: DIY Guide for Homeowners

HVAC

Blog
// Posted by Crossville Heating and Cooling, Inc.

It was a hot summer day when Lisa found her living room flooded. Her air conditioner had leaked, and water was gathering around it. As a new homeowner, Lisa was worried about what to do. With some help and hard work, she found the leak and fixed her AC quickly.

A leaking AC in summer can be stressful for homeowners. Even a small leak can cause big problems. Signs of an AC leak include water inside, less cooling, longer run times, higher bills, strange noises, and more humidity. Fixing these leaks is important to avoid damage, high bills, health risks, and harm to the environment. The cost to fix an AC leak can be about $400, but it can go from $200 to $1,000.

Key Takeaways

  • An AC leak can lead to water damage, higher energy bills, and system damage if left unaddressed.
  • Common signs of an AC leak include water pooling, reduced cooling, increased runtime, and higher humidity.
  • Fixing an AC leak typically costs around $400 on average, but can range from $200 to $1,000.
  • Regularly maintaining your AC system, including cleaning the drain line and replacing air filters, can help prevent leaks.
  • For more complex AC leak issues, it's best to call a professional HVAC technician.

Signs of an AC Leak

If your air conditioning (AC) system is leaking, it's crucial to spot the issue early. Knowing the signs of an AC leak lets you fix it fast and avoid big damages. Here are some common signs that your AC might be leaking:

Water Leaking Indoors

Your AC should leak water outside as it takes out humidity. But, if you see water leaking inside, it's a problem. Water dripping from the unit or gathering around it means the condensate drain line might be clogged or the drain pan has a crack.

Poor Cooling Efficiency

If your AC blows warm air or can't keep a steady temperature, it might have a refrigerant leak. This leak makes the system less efficient at cooling your home.

Longer Runtime

Running your AC for a long time without it cooling your home could mean a leak. The system works harder to cool because of the lost refrigerant, making it run longer.

Increased Energy Bills

A sudden jump in your energy bills might signal an AC leak. The system works harder to cool, using more electricity and increasing your bills.

Strange Noises

Listen for hissing or bubbling sounds from your AC unit. These sounds often mean a refrigerant leak, as the gas escapes.

High Indoor Humidity

Feeling unusually damp or muggy at home, even with the AC on, could point to a refrigerant leak. Leaks stop the system from removing humidity effectively.

Knowing these signs helps you spot an AC leak early. Fixing it quickly saves you time, money, and stress later on.

Causes of AC Leaks

If your air conditioning (AC) unit leaks water inside your home, finding the cause is key to stop more damage. Many issues can cause AC leaks, and fixing them quickly is important for a comfy home.

Clogged Condensate Drain Line

A clogged condensate drain line is a common reason for AC leaks. Mold, mildew, and algae can block the drain, stopping water from leaving the system. This makes the drain pan overflow, causing water to spill inside your home.

Cracked or Rusted Drain Pan

As AC units get older, the drain pan might crack or rust. This lets water escape and gather near the indoor part or drip into your home. If your AC is between 12 and 15 years old, you might need a new drain pan if it's damaged.

Refrigerant Leaks

A refrigerant or freon leak is a big problem that can be expensive and bad for the planet. These leaks happen as the metal, valves, and seals wear out over time. Low refrigerant levels can make the evaporator coil freeze, causing water leaks.

Dirty Air Filters

A dirty air filter stops the evaporator coil from absorbing hot air. This makes the coil freeze and then melt, leading to leaks. Changing your AC's air filter every 30 days can help avoid these leaks by keeping airflow open.

Check and Clean the Drain Pan

Your AC's drain pan can show if there's a leak. It's a key spot to check when you find a leak. First, turn off your AC and open the access panel to see the inside parts.

Find the drain pan under the evaporator coil. If it's full of water, use a wet/dry vacuum to clean it out. Then, wash the pan with soap and water. If water pours out when you add more, the pan has cracks that need fixing.

Shine a flashlight on the drain pan to look for cracks or damage. Mark where repairs are needed. Use a sealant to fix the cracks, letting it dry before checking again. If leaks persist, you might need a new drain pan.

Keeping the drain pan in good shape stops water buildup and leaks. Ignoring it can cause water damage at home. Regular checks and fixing or replacing the pan can save you money later.

  • Check the drain pan for any water accumulation or cracks
  • Use a wet/dry vacuum to dry the pan if there is water present
  • Clean the drain pan thoroughly with soap and water
  • Identify and seal any cracks using a water-resistant sealant
  • Replace the drain pan if the cracks cannot be effectively sealed

Inspecting, cleaning, and fixing your AC's drain pan can stop many leaks. This keeps your home safe from water damage. Keeping this part of your AC in good shape is key for its health and efficiency.

Clear the Condensate Drain Line

A clogged condensate drain line is a common reason for AC leaks. This line carries excess moisture from your air conditioning unit outside. Dirt, debris, or algae can block it, causing water to leak back into your home.

To fix this, start by finding the drain line near your outdoor unit. It's usually copper or PVC. Use a wire brush to clean the drain line, removing any buildup. Then, use a shop vacuum to suck out any leftover debris.

  1. Locate the copper or PVC drain line attached to the condensate pan.
  2. Remove the plastic cap or cover to access the opening.
  3. Use a wire brush to clean the inside of the drain line, removing any buildup.
  4. Place a shop vacuum at the opening and let it run for a few minutes to suction out any remaining debris.
  5. If the drain line is still clogged, pour a small amount of distilled vinegar down the line to help dissolve the blockage.
  6. If the vinegar does not drain properly, you may have a more serious blockage that requires a professional to clear.

Cleaning your AC's condensate drain line regularly is key to keeping your system running well and preventing leaks. By unclogging the drain, you help your air conditioner work better and avoid expensive water damage.

Replace the Air Filter

Even if your drain line was the issue, a dirty air filter can still cause problems. First, find and check your filter. If it's dirty, take it out and remember the size. Then, go to your local hardware store to buy a new one.

After getting home, swap the old filter with the new one. A dirty ac air filter stops the evaporator coil from absorbing hot air. This can make the coil freeze and melt, causing water leaks.

Changing the ac air filter is easy and won't break the bank. It can fix ac leaks from a clogged filter. Dirty filters block airflow and can freeze the evaporator coil, leading to leaks inside your home.

By changing the ac air filter often, you keep your air conditioning running well. This means your system will work better and use less energy.

  • Locate and examine the existing ac air filter.
  • If the filter is dirty, make a note of the filter size.
  • Purchase a new replacement ac air filter from your local hardware store.
  • Remove the old filter and install the new one.
  • A clean air filter will help prevent the evaporator coil from freezing and leaking water.

It's key to replace the ac air filter regularly to keep your air conditioning in good shape. Not doing so can cause leaks, lower cooling, and increase your bills. By keeping up with this easy task, you can avoid ac leaks and keep your home comfy all season.

Inspect for Refrigerant Leaks

If your drain line and air filter are clear, you might face a serious issue. Check your evaporator coils above the drain pan for ice build-up. This is a sign of a refrigerant leak that needs professional help.

Fixing refrigerant leaks is complex and should be done by experts. Trying to fix it yourself is risky and often fails. A skilled HVAC technician can find and fix the leak properly.

Call a Professional

For an ac refrigerant leak, calling a pro is the smart move. They have the right tools and knowledge to fix the issue right. Fixing it yourself can harm your AC and be dangerous.

Don't ignore a refrigerant leak in your AC. Contact a trusted HVAC contractor. They can find and fix the evaporator coil leak, making your system work well again.

how to fix ac leak inside

If you're facing an air conditioning (AC) leak inside your home, act fast. AC leaks can harm your property, cause mold, and raise your energy bills. Luckily, you can fix an indoor AC leak with a few steps.

Start by checking the drain pan for any debris or blockages. A clogged drain pan can cause water to overflow and leak into your home. Use a wet/dry vacuum to clean out the drain pan and make sure it drains well.

  • Clear any debris or obstructions from the drain pan
  • Use a wet/dry vacuum to suction out any standing water
  • Check that the drain line is not blocked and water is flowing freely

Then, look at the condensate drain line for any clogs or kinks. This line carries water from the drain pan outside. If it's blocked, water will leak back into your home. Use a wet/dry vacuum or a drain cleaning tool to clear the line.

  1. Locate the condensate drain line, usually near the indoor unit
  2. Use a wet/dry vacuum or drain snake to clear any blockages
  3. Ensure the drain line is properly sloped and free of kinks or bends

Lastly, check the air filter and replace it if it's dirty. A clogged air filter can make the evaporator coil freeze and cause leaks. Change the air filter every 1-3 months to keep your AC running well and prevent leaks.

If these steps don't fix the leak, you might have a refrigerant leak. These leaks need a licensed HVAC technician to fix. Trying to fix it yourself can be risky and won't work. Call a professional to fix it safely and right.

Prevent Future AC Leaks

Regular maintenance of your AC system can stop leaks and keep your home cool. By taking steps to keep your air conditioning unit in good shape, you can avoid expensive repairs. This ensures your home stays cool and comfortable all summer.

Regular Drain Line Maintenance

It's important to keep your drain lines clear to prevent clogs that can cause leaks. Use a wet-dry vacuum attachment on your outdoor drain every three months to remove any buildup. This simple step helps keep your system running smoothly.

Frequent Air Filter Replacement

Change your system's air filter every 30 to 90 days, especially in the summer. This helps prevent evaporator coils from freezing, which can lead to leaks. A clean air filter means better airflow and fewer problems.

Periodic System Inspections

Checking your outdoor unit and lines for damage once a quarter is a good idea. This can help spot leaks early, saving you time, money, and stress later on. Regular inspections are key to keeping your AC in top shape.

When to Call a Professional

For minor AC leak issues, like changing a clogged air filter or clearing a blocked drain line, you can try to fix them yourself. But for bigger repairs, especially those with refrigerant leaks, it's best to call a licensed HVAC technician. Trying to fix these problems yourself can void your warranty and lead to more damage, making things more expensive later.

It's safer to hire an HVAC professional for AC leaks and repairs, especially if they're from refrigerant lines or inside the unit. This way, you avoid any risks and ensure the job is done right.

Getting your AC checked twice a year can make it work better and last longer. A seasonal inspection helps keep your AC running smoothly. Servicing your AC twice a year keeps it in top shape.

Regular AC upkeep can save energy, make your system last longer, improve air quality, and keep warranties valid. It also reduces the chance of breakdowns.

A dirty air filter can make your AC work harder, use more energy, and overheat. Choosing a trusted AC repair professional means they can quickly find and fix problems. This keeps your system running efficiently.

For complex AC issues or refrigerant leaks, it's smart to hire an AC technician. They can fix the problem safely and correctly.

Conclusion

AC leaks can cause big problems for homeowners, like water damage, higher energy bills, and harm to the environment. By following this guide, many homeowners can fix minor AC leaks by themselves. This includes checking and cleaning the drain pan, clearing the condensate drain line, replacing a dirty air filter, and looking for refrigerant leaks.

For big problems, especially those with refrigerant, it's smart to call a licensed HVAC pro. They can fix the issue right. Regular maintenance, like cleaning the drain line and changing air filters, can also stop AC leaks before they start. This keeps your system working well.

It's important to fix AC leaks quickly to protect your home and save money over time. By being proactive and keeping an eye on your air conditioning, you can keep your home cool and dry. This is key during the hot summer months.

HVAC Technician installing a electric heat pump
About Crossville Heating and Cooling, Inc.
Crossville Heating and Cooling, Inc. is a locally owned heating and air conditioning company that provides sales, service, and installation of any type of heating or cooling in your home or light commercial building.

Although the name Crossville Heating and Cooling, Inc. is new, Mr. Richard Gilmer has been in the business of keeping his neighbors comfortable since 1998. As our presence in the HVAC contractors industry has evolved, we decided to change the name of our business to better reflect our commitment to the Middle TN area.

Our core values include implementing economically friendly products and practices to better contribute to the health and home of our customers. We are EPA certified and ensure that all refrigerant is recycled and all equipment is disposed of as per environmentally-safe standards. Our service techs and installers are trained to conduct business with minimal disruption to your daily lifestyle so that the only impact we make is a positive one

FAQ

What are the signs of an AC leak?

Signs of an AC leak include water leaking indoors, cooling efficiency dropping, longer runtime, higher electric bills, hissing or bubbling noises, and increased indoor humidity.

What causes AC leaks?

AC leaks can happen due to a clogged condensate drain line, a cracked or rusted drain pan, refrigerant leaks, or dirty air filters.

How do I check and clean the drain pan?

First, turn off your AC. Then, remove the access panel. Next, find the drain pan under the evaporator coil. Use a vacuum to dry it, and clean it with soap and water.

If it has cracks, seal them with a water-resistant sealant.

How do I clear the condensate drain line?

Start by finding the copper or PVC drain line near the outdoor condenser. Clean the inside with a wire brush. Then, use a shop vac at the opening to remove debris.

Finally, pour distilled vinegar down the line to clear any blockage.

How do I replace the air filter?

First, locate and check your filter. Note its size, then buy a new one. Replace the old filter with the new one.

How do I inspect for refrigerant leaks?

Look closely at the evaporator coils above the drain pan. If you see even a small amount of ice build-up, you have a refrigerant leak. This needs a professional's help.

How can I fix an AC leak inside the house?

Start by checking and cleaning the drain pan. Then, clear the condensate drain line. Don't forget to replace the dirty air filter.

Inspect for refrigerant leaks. If the drain line and filter are clear but you still have a leak, you might have a bigger issue. This could be a refrigerant leak needing a professional's help.

How can I prevent future AC leaks?

Keep your AC system in good shape by regularly cleaning the drain lines, replacing air filters, and doing system inspections.

When should I call a professional for AC leak repair?

Call a licensed HVAC professional if you think there's a refrigerant leak or if you have complex issues you can't fix yourself. This ensures the problem gets properly diagnosed and fixed.

HVAC Technician installing a electric heat pump
About Crossville Heating and Cooling, Inc.
Crossville Heating and Cooling, Inc. is a locally owned heating and air conditioning company that provides sales, service, and installation of any type of heating or cooling in your home or light commercial building.

Although the name Crossville Heating and Cooling, Inc. is new, Mr. Richard Gilmer has been in the business of keeping his neighbors comfortable since 1998. As our presence in the HVAC contractors industry has evolved, we decided to change the name of our business to better reflect our commitment to the Middle TN area.

Our core values include implementing economically friendly products and practices to better contribute to the health and home of our customers. We are EPA certified and ensure that all refrigerant is recycled and all equipment is disposed of as per environmentally-safe standards. Our service techs and installers are trained to conduct business with minimal disruption to your daily lifestyle so that the only impact we make is a positive one

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