On a hot summer day, there’s nothing better than coming home to a cool and comfortable house. However, if you notice water pooling outside your air conditioner, then you have a problem that requires immediate attention. Not only can this leaking water lead to expensive repairs, but it can also cause your AC unit to work inefficiently and decrease its lifespan. In this article, we will guide you through the steps to fix your air conditioner leaking water outside, so you can enjoy a cool and relaxing home without any worries.

1. Identifying the Causes of Air Conditioner Leaking Water Outside

If you notice water pooling around your air conditioner unit, it could be an indication that it is leaking water outside. There are several factors that could lead to this issue, and it is essential to identify the cause to prevent further damage to your system.

Clogged Drain Line:

One of the common causes of water leakage from an air conditioner is a clogged drain line. Over time, dirt, dust, and debris can accumulate in the drain line, preventing water from flowing out of the condensate pan. This buildup causes the pan to overflow and leak water outside.

Frozen Evaporator Coils:

If the evaporator coils in your air conditioner become frozen, they will stop absorbing the humidity from the air. The frozen coils cause the condensation to accumulate and overflow, leading to water leaks outside the unit.

Blocked Condensate Pan:

If the condensate pan in your air conditioner is damaged or blocked, it will prevent the water from draining out of the unit. This situation will cause the condensation to overflow and result in water leakage outside the system.

Identifying the cause of the water leak outside your air conditioner is the first step to fix it. Once you identify the issue, you can take appropriate steps to maintain and repair your system.

2. Common Mistakes to Avoid when Fixing an Air Conditioner Leaking Water Outside

When it comes to fixing an air conditioner leaking water outside, there are some common mistakes that people make that can actually make the problem worse. Here are some mistakes to avoid when completing this task:

1. Not cleaning the filters:

One of the most common reasons why air conditioners leak water outside is clogged air filters. If the filters are clogged with dust and debris, the unit will have to work harder to cool the air, causing the evaporator coil to freeze and then thaw, resulting in water pooling outside. If you don’t clean or replace the filters regularly, you will continue to have this issue. It is recommended to clean or replace the filters at least once every three months.

2. Overcharging the refrigerant:

Some people think that adding more refrigerant will fix the issue, but this can actually cause more problems. Overcharging the refrigerant can lead to the compressor failing, causing expensive repairs. To avoid this, make sure you have the proper equipment and knowledge to add the correct amount of refrigerant.

3. Not cleaning the condensate drain line:

The condensate drain line is another area that can become clogged with dirt, algae, and other debris. When this happens, water will start to pool outside. Always check the condensate drain line for blockages and clean it out as needed.

By avoiding these common mistakes, you can ensure that your air conditioner is repaired properly and is working efficiently. A well-maintained air conditioner will not only save you energy and money but will also have a longer lifespan.

3. Step-by-Step Guide on How to Fix an Air Conditioner Leaking Water Outside


In this section, we will discuss the step-by-step process of fixing an air conditioner that is leaking water outside. Follow these simple instructions to avoid causing further damage to your unit and ultimately increase the longevity of your air conditioning system.

Step 1: Turn off the Power

Before you start any repair work on your air conditioner, make sure to turn off the power. This means both the electric power and the air conditioner unit itself.

Step 2: Clean the Area Surrounding the Air Conditioning Unit

Remove any debris such as sticks, leaves, or grass clippings that have accumulated around the unit. This debris can clog the unit’s drainage system and cause a water leak.

Step 3: Check the Condenser Coil

The condenser coil is responsible for cooling the air that passes through the air conditioning unit. Over time, the coil can become dirty which restricts the flow of air and makes it more difficult for the unit to cool the air. When this happens, condensation builds up and can lead to a water leak. Clean the condenser coil with a soft-bristled brush or compressed air to remove any dirt or debris that has accumulated on it.

Step 4: Check the Drain Line

The drain line is responsible for removing excess water from the air conditioning unit. If the drain line becomes clogged, it can cause water to back up and leak outside. To check the drain line, locate it outside near the unit, and ensure that it is free of debris. Insert a wet/dry vacuum into the drain line to remove any blockages.

Step 5: Check the Evaporator Coil

The evaporator coil is responsible for removing heat and moisture from the air inside your home. If the coil becomes dirty or damaged it can cause the unit to leak water outside. Inspect the evaporator coil and clean it with a soft-bristled brush or compressed air if necessary.

By following these simple steps, you can fix an air conditioner that is leaking water outside. However, if you are unsure about any of these steps or if the problem persists, it may be time to call in a professional for assistance. Remember, regular maintenance is key to preventing future water leaks and extending the life of your air conditioning unit.

4. Tips and Tricks for Maintaining Your Air Conditioner to Avoid Water Leaks Outside

Maintaining your air conditioner is a crucial part of ensuring that it runs efficiently, effectively, and without any hiccups. One of the most common issues that air conditioners face is water leaking outside, which can be a nuisance, a potential hazard, and can even damage the surrounding area. To avoid this, it’s important to take certain steps to maintain your air conditioner regularly.

Clean the Air Filters Regularly

One of the most common reasons for water leaking outside of an air conditioner is due to a clogged air filter. Dirty air filters can cause the evaporator coil to freeze up, which can result in water overflow and leaks outside of the unit. By regularly cleaning or replacing your air filters, you can prevent this problem from occurring.

Check for Clogged Drain Lines

A clogged drain line can also cause condensation problems and may result in water leaking outside of the unit. To prevent this, it’s essential to check and clean your drain lines regularly. Use a wet-dry vacuum to suck out any debris and build-up that could be causing blockages.

Clean and Inspect the Evaporator Coils

Evaporator coils are an integral part of an air conditioner, but they can also cause water leaks outside of the unit. Dirt, dust, and debris can accumulate on the coils, which can cause the coils to freeze and lead to water leakage. Regularly cleaning and inspecting the coils is essential to prevent this issue from happening.

By taking these simple steps, you can maintain your air conditioner and prevent water leaks from occurring. Remember to schedule regular maintenance checks with a professional to ensure that your unit is functioning optimally.

5. Signs It’s Time to Call in a Professional for Air Conditioner Leaking Water Outside

Sometimes, fixing an air conditioner leaking water outside requires the expertise of a professional. If you’re experiencing any of these issues below, it’s time to call in the experts to troubleshoot and fix your AC.

1. Continuous Leaking Water

If you notice your air conditioner continuously leaking water outside, this could be a sign of a major problem. This might indicate a clogged drain line, a damaged condenser pump, or a refrigerant leak. Attempting to fix these major issues yourself could lead to even more expensive repairs. It’s best to call in a professional HVAC technician to diagnose and repair the issue.

2. Unusual Sounds or Smells

If you notice unusual sounds or smells coming from your air conditioner, this could indicate a serious problem with your unit. For instance, a grinding noise could indicate that there is a damaged motor or loose part. If you smell burning or electrical, this could indicate that the wiring is damaged, which can lead to a fire. Call in a professional technician immediately if you hear or smell something unusual.

3. Decreased Airflow or Cooling

If you notice that your air conditioner is not cooling your home like it used to, it could be due to a variety of issues. These issues might include a refrigerant leak, a clogged filter, or a damaged duct. While some of these issues can be fixed, a complicated issue may require a professional air conditioner repair technician to diagnose and fix the problem.

Remember, attempting to fix major issues yourself or ignoring the signs of an air conditioner leaking water outside can lead to more expensive repairs or even complete replacement of the unit. Always call in a professional HVAC technician if you’re experiencing any of the above issues to avoid further damage and ensure your AC unit is running efficiently.

People Also Ask

Why is my air conditioner leaking water outside?

An air conditioner leaking water outside may be caused by a clogged or damaged drain line. It could also be due to a dirty air filter, low refrigerant levels or a faulty condensate pump.

How do I unclog my air conditioner drain line?

To unclog an air conditioner drain line, locate the drain line and remove the cap. Use a wet/dry vacuum to suction out the clog. You can also use a homemade solution of equal parts water and vinegar to dissolve the clog, but avoid using harsh chemicals.

What should I do if my AC is leaking water outside?

If your AC is leaking water outside, turn off the power to the unit and shut off the circuit breaker. Check and replace a dirty air filter, inspect drain lines or pipes, and clear any clogs. If the problem persists, call an HVAC professional to diagnose and fix the problem.

How often should I clean my air conditioner’s condensate drain line?

It is recommended to clean your air conditioner’s condensate drain line at least once a year. If you have pets, live in a high humidity area, or notice more water leakage than usual, it is suggested to clean it more frequently.

Can a leaking air conditioner be dangerous?

A leaking air conditioner can cause water damage to your home and can be a potential hazard to your health. A damp and humid environment can lead to mold and mildew growth, which can cause respiratory issues. It is important to fix any air conditioner leaks as soon as possible to prevent further damage.


An air conditioner leaking water outside is usually caused by a clogged or damaged drain line, a dirty air filter, low refrigerant levels, or a faulty condensate pump. To fix the problem, you can unclog the drain line, replace a dirty air filter, or call an HVAC professional for diagnosis and repairs. It’s important to clean your air conditioner’s condensate drain line at least once a year to prevent clogs and leaks.