Causes of AC Water Leaks – Many people don’t know the causes of AC water leaks. In fact, leaking air conditioners are often a problem that disrupts the comfort and cooling efficiency of your home or office.
Leaks in the air conditioning unit not only reduce the performance of the AC, but can also cause further damage to the system and increase repairing costs.
Understanding the factors that cause AC leaks is important so that we can take the right preventive measures. ‘
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So, in today’s article we will discuss the common causes of AC water leaks to get a better understanding about this common problem in your AC unit!
Table of Contents
Causes of AC Water Leaks

Leaking air conditioners can occur in several parts such as pipes, connections, or other components.
Leaks in the AC can cause a number of problems, including decreased cooling efficiency, increased electricity costs, and damage to the AC components.
1. Clogged Drain
One of the most common causes of an AC leak is a clogged drain line. When an air conditioner operates, it condenses water vapor from the air which is then collected and drained through the drain line.
If this drain is clogged with dust, dirt, or mold, the condensation water will overflow and leak from the AC unit.
2. Dirty Air Filters
A dirty or clogged air filter can cause the air conditioner to work harder to draw in air, which in turn can cause freezing on the evaporator coil.
When the ice that forms on the coil melts, water drips down and can cause leaks. Regular filter cleaning or replacement can prevent this problem.
Also Read: “How to Choose Air Conditioner for Your Home?“
3. Leaking Refrigerant
In some cases, your air conditioner may not be blowing cold air, but instead blowing refrigerant. This symptom can be a blast of warm air instead of a cool comfortable breeze followed by a leak.
Refrigerant Is a liquid used to cool the air, but long-term exposure to refrigerant can be harmful to your health.
If your air conditioner is showing signs of a refrigerant leak, it’s best to call a professional technician to fix it right away.
4. Improper Installation
Improper AC installation can lead to various problems, including leaks. If the AC unit is not installed with the right slope, the condensation water will not flow smoothly into the drain, leading to leakage from the unit.
To prevent this problem, ensure that the installation is done by an experienced technician and according to the set standards.
The experience and expertise of the technician ensures that the AC unit is installed with the correct tilt, thus avoiding potential leaks and other problems.
5. Dirty Evaporator Coil
A dirty evaporator coil can hinder the cooling process and cause freezing on the coil. When the ice on the coil melts, the dripping water can cause leaks.
Therefore, it is important to perform regular coil cleaning to prevent this problem. By keeping the coil clean, you can ensure optimal cooling efficiency and reduce the risk of leaks caused by ice build-up.
6. Outdated AC Unit
Older AC units tend to experience more problems including leaks. Over time, AC components can wear out and not function properly.
Gaskets and seals can also age and cause leaks. Regular maintenance and replacement of the unit if it is too old can prevent the leaks from happening.
Also Read: “5 Types of Air Conditioner“
7. Condensate Pump Malfunction
In some air conditioning units, especially those installed at a location lower than the discharge point, a condensate pump is used to pump the condensation water out.
If this condensate pump is damaged or not functioning properly, the condensation water will not be discharged properly and may cause leaks.
Ensuring the condensate pump is functioning optimally is important to prevent water buildup that could result in damage to the unit and potential leaks in the surrounding area.
8. Broken Drain
A broken or leaking drainage pipe is another cause of an AC leak. The drainage pipe drains the condensation water from the AC unit to the outside.
If this pipe breaks or has a leak, water will seeps from the pipe and cause puddles around the AC unit.
So there you have it! The common causes of AC water leaks for you to identify alongside with its preventive measurements!
Did you know you can prevent leaking from your AC by choosing the AC that has been certified by the SNI certification in Indonesia?
Yup, the AC s one of the many products that are mandatory to be certified by the SNI certification in Indonesia
This is because the risk of an air conditioner might be concerning for the Indonesian consumers, as the AC that is not properly manufactured can cause a failure and can even be dangerous for its users.
The air conditioner that is about to be distributed in Indonesia must undergo a series of tests to determine its quality and safety.
After all of those tests have passed and the air conditioner is met with the requirements that have been set, the air conditioner is ready to be distributed and sold in the Indonesian market.
For the air conditioner and other household electrical devices, the regulation is clearly stated in SNI IEC 19-6713-2002.













