How to Fix Leaking AC Unit

Summertime is right around the corner, which means many people will be turning on their air conditioners. Unfortunately, if your air conditioner is leaking, you’re not alone. Leaks are one of the most common AC problems, and they can cause a lot of damage if not fixed quickly.

How to Fix Leaking Ac Unit

This article will show you how to fix leaking ac unit. Arm yourself with knowledge, and you’ll be able to get your AC back up and running in no time! With just a few simple tools and a bit of know-how, you can get your unit back up and running in no time. So what are you waiting for? Let’s get started!

Summary: This blog post will help you figure out the source of your leaking AC unit and provide steps to fix it. From ensuring that the condensate line is functioning properly and checking for debris in the outdoor unit, to tightening connections and checking for refrigerant leaks, this guide will help you identify and address the issue quickly.

11 Reasons That Causes Leaks in AC Unit

1. Damaged or Old Air Conditioner Unit:

The most common reason for a leaky AC unit is old or damaged. If your AC unit is more than 10 years old, it will likely start leaking. This is because the seals and gaskets inside the unit can wear out over time, causing water to seep through and leak onto the floor. Another common reason for a leaky AC unit is a clogged condensate drain line. The condensate drain line is responsible for carrying away water that has condensed inside the unit. If this line becomes clogged, water will back up and leak out of the unit.

2. Clogged Drainage System:

If there is something blocking the drainage system, the water will not be able to flow away from the AC unit. This could cause water to build up and leak out of the unit. To fix this, the drainage system will need to be cleared.

3. Faulty Pan:

The AC unit leaks water into a pan. If the pan is damaged, it will cause leaking. You will need to replace the pan with a new one to fix this.

4. Dirty Air Filter:

A clogged air filter can make your AC unit work harder than necessary, potentially causing a leak. To fix this, simply replace the air filter with a new one – your AC unit will work like new again.

5. Low Refrigerant:

If the AC unit doesn’t have enough refrigerant, it might not be able to cool the air properly, which could make the unit start leaking. You can ask a professional to put more refrigerant in the AC unit, or you can try doing it yourself. If you decide to do it yourself, be sure to read the instructions carefully and be careful not to hurt yourself.

Ask a Professional to Put More Refrigerant

6. Faulty Seals or Gaskets: 

This is one of the most common reasons for an air conditioner leaking water inside your home. Over time, seals and gaskets can dry out or become brittle and crack, allowing coolant to escape. You’ll need to replace any damaged seals or gaskets to stop the leaks.

7. Cracks in the Coolant Lines: 

Coolant lines can develop cracks over time due to corrosion or other damage. If you notice any cracks in your coolant lines, you should replace them as soon as possible to prevent the coolant from leaking.

8. Damaged Coils:

A common cause for a leaking AC unit is damage to the coils. If the coils are damaged, then the refrigerant will escape, leading to water leakage. The best way to prevent this is to have your unit inspected and serviced regularly. If you do find that your coils are damaged, you can have them repaired or replaced.

9. Improper Installation:

If your AC unit was not installed properly, it could begin to leak. This is especially true if the unit was installed by someone not a professional. If you suspect that your AC unit was not installed properly, contact a professional to look at it and determine whether or not it needs to be reinstalled.

10. Condensation:

Another common reason why AC units leak is because of condensation. If the unit is not properly ventilated, the condensation can build up and eventually cause the unit to leak. Ensure your AC unit is properly ventilated by leaving a window open or installing a fan nearby.

Ensure Ac Unit Is Properly Ventilated

11. Extreme Temperatures:

If the AC unit is subjected to extreme temperatures, it can cause the seals and gaskets to break down. This can lead to leaks. Inspect the unit for any cracked seals or gaskets and replace them if necessary.

10 Ways on How to Fix Leaking AC Unit

1. Check the Condensate Line:

The condensate line is the most commonplace for air conditioners to leak. To check it, turn off your AC and locate the outside unit. There should be a PVC pipe coming out of the side of the unit. Follow the pipe until it reaches a small hole near the ground. If water is leaking from this hole, the fix is easy just cover the hole with some weatherstripping or duct tape.

2. Check the Drainage Tubing:

If your AC is leaking water from inside your home, the drainage tubing is likely clogged. This tubing runs from the AC unit to a drainage hole in the ground outside your home. To clear the clog, remove the drainage tubing and clean it out.

3. Clear Debris From the Outdoor Unit:

Debris-like leaves and sticks can easily block the airflow of your AC unit, causing it to overheat and leak. Clear away any debris from around the outdoor unit each time you mow your lawn to prevent this.

4. Replace the AC Filter:

A clogged air filter will also cause your AC unit to overheat and leak. To fix this, simply replace the old filter with a new one. Doing this every few months will keep your AC unit running smoothly and help prevent leaks.

5. Check the Evaporator Coil:

The evaporator coil is located inside the indoor unit of your AC. If it becomes dirty, it will not be able to absorb the moisture in the air, causing your AC to leak. To clean the coil, remove the unit’s front panel and use a brush to scrub off any dirt or dust.

Evaporator Coil Is Located Inside the Indoor Unit

6. Tighten the Connections:

Loose connections are a common cause of air conditioner leaks. The most likely culprits are the connection between the condenser and the evaporator coils or the connection between the compressor and the evaporator coils. To fix this issue, tighten the screws or bolts holding these connections in place. You may need a wrench or socket set to do this.

You Can Check It Out To Fix Air Conditioner Leaking Water Outside

7. Check for Refrigerant Leaks:

If your AC unit is leaking Freon, there is likely a hole in the refrigerant line. Turn off your AC unit and wait for the Freon to dissipate to find the leak. Once the Freon has dissipated, start your AC unit and use aFreon detector to find the source of the leak. If you don’t have a Freon detector, you can purchase one online or local hardware store.

8. Repair or Replace the Refrigerant Line:

Once you’ve located the leak, you can either repair the hole with a Freon patch kit or replace the entire refrigerant line. If you choose to repair the hole, carefully follow the instructions included with the kit. If you choose to replace the line, disconnect the old line before connecting the new one.

9. Replace the O-Rings:

If your AC unit uses o-rings to seal the connections, these o-rings may have become worn or damaged and are no longer sealing correctly. Replacing the o-rings is a relatively easy fix that you can do yourself. Simply buy a replacement o-ring kit from your local hardware store and follow the instructions.

10. Call a Professional:

If you’ve tried all of the above fixes and your AC unit is still leaking, it’s time to call in a professional. A professional can help you diagnose the problem and may need to order replacement parts for your AC unit. In some cases, it may be more cost-effective to replace your AC unit entirely.

You Can Check It Out To Fix Clogged Gas Line

Some Tips to Prevent Leaks in Ac Unit

  1. Inspect and clean your air conditioner regularly.
  2. Keep the area around your air conditioner free of debris and vegetation.
  3. Make sure your air conditioner is properly insulated.
  4. Check for leaks in the ductwork connected to your air conditioner.
  5. If you have an older model air conditioner, have it serviced regularly by a qualified technician.
  6. If you live in an area with high humidity, use a dehumidifier to help reduce the risk of leaks.
  7. Make sure the drain line from your air conditioner is clear and unobstructed.
  8. If you have a central air conditioner, check the outdoor unit for leaks.
Make Sure Air Conditioner Is Properly Insulated

Frequently Asked Questions

Do I Get My Air Conditioner to Stop Leaking?

Many homeowners experience problems with their air conditioner occasionally leaking water; however, there are a few things that you can do to try and prevent this from happening. The first thing you should do is check your supplier’s warranty information. If the AC has less than 10 years of coverage or if it was installed by a professional contractor, then your warranty may not apply.

If these steps don’t solve the problem, then you might need to inspect your unit for signs of wear and tear or defective parts. Make sure that all connections are tight and free from corrosion; replace any worn or damaged parts as necessary. Last but not least, make sure to keep an eye on watering schedules and avoid filling up your HVAC system more often than necessary.

Why is My Air Conditioner Dripping Water?

There are a few potential reasons why your air conditioner is dripping water. One possibility is that the condensation barrier on the outside of the unit has been dislodged or damaged. This can happen if there is an obstruction in the ducts or if debris accumulates over time. In order to fix this, you will need to take apart the unit and clean out all of the obstructions.

Another common reason for water leakage from air conditioning units is a torn HVAC coil or refrigerant lines. When this happens, cold climate energy (such as winter wind) enters into warm indoor spaces and causes ice crystals to form on internal parts like tubing and coils.

Over time, these crystals wear away at insulation and eventually lead to leaks. To prevent this from happening, make sure to keep your AC coil covered when not in use, ensure that insulation levels are high enough within your building, check for signs of freezing inside your AC unit (curls on tubes), and replace worn-out components as needed.

Is It Worth Fixing an Air Conditioner Leak?

the cost and severity of an air conditioning leak will vary depending on the size and type of the leak, as well as the climate where the AC is located. That said, if you’re concerned about the potential health hazards related to AC leaks, it may be worth taking some steps to address the issue.

To determine the extent of the leak, you can use a wet/dry vacuum to collect water and debris from around the AC unit. You can also use a camera to document any damage to the exterior of the unit.

If either of these methods reveals a significant leak, you may need to call in a professional to fix it. In general, repairing small AC leaks can be done relatively cheaply and quickly, while larger leaks may require more extensive repair work.

What Happens When Freon Leaks From Air Conditioner?

When Freon leaks from an air conditioner, it can create dangerous and potentially fatal gases. These include formaldehyde, which is a colorless liquid that has a sweet odor and corrosive properties, as well as methyl chloride gas (MC), which is poisonous and causes nausea, vomiting, dizziness, headaches, confusion, coma or death.


If you are experiencing a leaking air conditioner, it is important to take action as soon as possible. The longer the unit remains leaky, the more damage will be done, and the more expensive the repairs will be. In most cases, fixing a leaking AC unit is a relatively simple process that can be completed in just a few hours.

By following these steps on how to fix leaking ac unit, you can stop your AC from leaking and keep your home cool and comfortable all summer long. We hope this blog post was helpful. If you have any questions or want to know more, then feel free to comment below!

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