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4 Surprising Reasons Your Aircon is Leaking Water: Things You Need to Know

an aircon is leaking water caused by some damage that needs fixing

If your aircon is leaking water, you might be in for more trouble than just discomfort. It’s essential to have a good aircon to keep your house cool and comfy. But if it’s leaking water, it can cause harm to your stuff and even make you sick. In this blog, we’ll explore 4 surprising reasons why your aircon is leaking water and what you need to know to prevent further damage. So, keep reading to find out!

4 Reasons Why Your Aircon is Leaking Water

Is your aircon leaving puddles on your floor? It might be leaking water. This is happening for several reasons and it’s important to address the issue to avoid further damage. Here are 4 possible causes of a leaking aircon.

Blocked Air Filter

dirty air filter of an aircon resulted to blocked air filter

Do you know that a blocked air filter can cause your aircon to leak water? The air filter in your aircon helps trap dust, dirt, and other particles. Over time, these particles can accumulate and clog the filter, reducing the airflow and causing the evaporator coil to freeze. When the coil thaws, the excess water drips into the aircon, causing it to leak.

A blocked air filter not only leads to water leakage but also affects the performance of your aircon. When the air filter is clogged, it makes it harder for the air to pass through the system, which means your aircon has to work harder to produce cool air. This extra strain on your aircon increases energy consumption and can result in a higher electricity bill.

So, if you notice that your aircon is leaking water, start by checking the air filter first. A dirty air filter should be cleaned or replaced. Not only will this solve the water leakage problem, but it will also improve the performance of your aircon.

To avoid a blocked air filter, cleaning or replacing it regularly is essential. The frequency depends on the usage and the environment in which your aircon operates. If you own pets or reside in a dusty location, you may need to clean or replace the filter more frequently.

Low Refrigerant Levels

One of the biggest problems with low refrigerant levels is that it can cause water leaks. This happens because the refrigerant plays an important role in removing moisture from the air. When there isn’t enough refrigerant, the evaporator coil can get too cold and cause condensation outside the unit. This excess moisture can then leak out and cause water damage to your home.

But water leaks aren’t the only problem you might encounter with low refrigerant levels. You might observe that your air conditioning system is no longer as efficient in cooling your home as it once was. This is because the AC unit has to work harder to achieve the desired temperature when there isn’t enough refrigerant. As a result, your air conditioning unit will consume more energy, which can lead to higher electricity bills.

Also, low refrigerant levels can cause the compressor to overheat, seriously damaging your AC system. Another consequence is that the evaporator coil may freeze up, which will cause your air conditioner to stop working altogether.

Damaged or Clogged Drain Line

To start with, your air conditioner produces a lot of water as it runs. This water is a byproduct of the cooling process. It must be drained from the unit to prevent damage and maintain proper function.

The drain line carries this water away from the aircon and out of your home. But, if the drain line becomes damaged or blocked, the water may not be able to flow freely, leading to a backup of water in the unit.

This backup can cause all sorts of problems. If there is too much water, it can harm the inside parts of the air conditioner. This could be expensive to fix or may need buying a new air conditioner. Additionally, if the air conditioning system has a backup, it can produce less cool air. This can make the system less effective, leaving you feeling too warm and uncomfortable.

Moreover, a damaged or clogged drain line can also increase energy consumption. When the air conditioner has to work harder to compensate for the reduced efficiency caused by the backup, it uses more energy to keep your home cool. This can lead to increased charges for electricity and wasted energy.

A damaged or clogged drain line is a severe problem for your air conditioning system. It can lead to water getting stuck, harm to the inside parts of the device, less efficiency, and use more energy.

Improper Installation

Proper installation is crucial to ensure an air conditioner works effectively. A poorly installed air conditioning unit can result in water leaks, which can be a real headache for homeowners. Water leaks can harm your walls, floors, and furniture. Moreover, they can be risky for your health because they create an ideal place for mold and bacteria to grow. 

So, what are some common installation mistakes that can lead to aircon water leaks? One of the most common mistakes is not securing the unit in place. If the unit is not secured, it can vibrate and shake, which can cause the condenser drain line to become disconnected, resulting in water leaks.

Another common installation mistake is not properly insulating the refrigerant lines. When refrigerant lines are not insulated, they can become too cold, and this can cause condensation to form on the outside of the lines. This condensation drips onto the ceiling or walls, causing water leaks.

Improper aircon unit drainage system installation can also cause water leaks. If the drainage system is not set up correctly, water can back up into the unit and overflow, causing water damage and leaks.

Making these installation mistakes can not only harm your air conditioner’s performance but can also cause you to use more energy.

Consequences of Ignoring a Leaking Aircon

1. Decreased energy efficiency

When an aircon is leaking, it’s not functioning correctly. This can cause it to work harder than it needs to cool your home, which in turn uses up more energy. As a result, you may notice an increase in your energy bills, even if you’re using your aircon less often than usual.

Another problem with a leaking aircon is that it can strain the system. When the unit works harder to compensate for the leak, it can cause parts to wear down more quickly or even break altogether. This can lead to expensive repairs or even the need for a replacement unit.

In addition to these issues, a leaking aircon can lead to uneven cooling in your home. This can be especially noticeable if the leak occurs in a specific unit area, causing it to work less efficiently.

2. Reduced air quality

When your air conditioner is leaking, it can cause moisture to accumulate in your home. This excess moisture can lead to the growth of mold and mildew, which can be dangerous to your health. In addition, if mold and mildew are growing in your air conditioner, the air that flows into your home can carry those spores with it. This can cause health problems for you and your family because the spores can spread throughout the air and be breathed in. 

Speaking of health hazards, that’s another major consequence of ignoring a leaking air conditioner. In addition to the mold and mildew mentioned earlier, the excess moisture can also create an ideal environment for bacteria and other harmful organisms to thrive. If you don’t care about the problem, it can lead to breathing problems, allergies, and other health issues.

And of course, we must remember the mold and mildew growth itself. This can lead to unsightly stains on your walls and ceilings and a musty odor that can be difficult to eliminate. Not to mention, if the problem is severe enough, it can damage your home’s structure.

3. Compromised System Performance

A leaking aircon can compromise the system’s performance. When the unit leaks, the coolant that’s responsible for keeping your aircon cold can escape. This means your aircon won’t be able to cool your space as it should. You may notice that it takes longer to reach your desired temperature or that the air blowing out of the unit is warmer than it used to be.

Ignoring a leaking aircon can shorten the lifespan of the unit. The coolant that leaks out of the aircon doesn’t just affect performance—it can also cause damage to the internal components of the unit. Over time, this damage can lead to the aircon breaking down prematurely. If you want to maximize the advantages of your air conditioner, addressing any leaks as soon as you notice them is essential.

Lastly, a leaking aircon can pose a potential for system failure. As the coolant leaks out, the pressure inside the aircon changes. This can cause other parts of the unit to work harder to compensate, leading to overheating or other issues. In extreme cases, this can cause the aircon to fail, leaving you no cool air.

Knowing When to Call a Professional Assistance

professional technician fixing an aircon

As much as we love to be experts in everything, sometimes we need to call in the professionals. This is mainly true when it comes to aircon leaks. Here are the situations where it’s essential to seek professional help.

  • Persistent or recurring leaks

If you’ve tried to fix a leak on your aircon many times, but it keeps coming back, it’s time to call in the pros. A persistent or recurring leak shows a more significant issue with your aircon that needs to be addressed. A professional aircon technician can help you identify the cause of the issue and provide a long-term solution.

  • Inability to identify the source of the leak.

Sometimes, aircon leaks can be tricky to pinpoint. If you have looked in all the expected places but still can’t find where the leak is coming from, it’s best to ask professionals for help. A professional aircon technician has the knowledge and tools to diagnose issues, saving you time.

  • Low refrigerant levels or suspected refrigerant leaks.

Refrigerant is the lifeblood of your aircon. It’s responsible for cooling the air circulating through your home or office. If you feel like your air conditioner isn’t cooling the way it used to or you suspect a refrigerant leak, it’s important to get help from a professional. You need special knowledge and tools to work with refrigerants, so you shouldn’t try to do it yourself.

  • Complex issues requiring specialized Tools or expertise from a professional.

Aircon systems are complex machines that need specialized knowledge and tools to repair properly. Suppose you have a difficult problem, such as a broken compressor or a damaged evaporator coil. In that case, it’s important to get help from a professional. Attempting to repair these problems yourself can lead to further damage and expensive repairs.

  • Your aircon isn’t cooling your space as well as it used to.
aircon not cooling the space as it is used too

If you notice that your aircon isn’t keeping your space as cool as it used to, it’s time to call in the professionals. This could indicate a refrigerant leak or a more significant issue with your aircon’s internal components.

  • You hear strange noises coming from your aircon.

If your aircon is making strange noises, like banging, hissing, or rattling, it’s time to call in the experts. These noises could be a sign of a loose or damaged component, which can lead to more significant issues down the line.

  • Your aircon smells bad.

If you notice an undesirable odor coming from your aircon, like a musty or burning smell, it’s time to call in the experts. These odors could be a sign of a more significant issue with your aircon’s internal components, which can be dangerous if left unaddressed.

So, if you notice these signs, don’t hesitate to call the professionals. Jing Yit, for instance, is a reputable aircon servicing company in Singapore that can help you with all your aircon needs. Our technicians can examine and fix any problem with your air conditioning system.

Professional aircon technicians have the proper tools and equipment to perform repairs efficiently. Attempting to repair an aircon without the proper tools can lead to injury or further damage to your aircon.

Another benefit of seeking professional aircon help is that they can help you prevent future issues with your unit. When you schedule regular aircon maintenance, you can catch any possible problems early and avoid them from becoming bigger issues later on.

Tips for Avoiding Aircon Leaks

Are you tired of dealing with aircon leaks? These pesky leaks can be a nuisance, causing damage to your home and harming your health. But don’t worry, we’ve got you covered. Here are some useful tips to avoid aircon leaks and keep your system running smoothly: 

1. Change air filters.

One of the easiest ways to prevent aircon leaks is by regularly changing the air filters. Clogged or dirty air filters can cause the aircon unit to work harder, leading to potential leaks.

2. Ensure proper installation. 

A poorly installed aircon unit can lead to leaks, so it’s important to ensure it’s installed correctly. Hire a professional to install your aircon and make sure they follow the manufacturer’s instructions.

3. Inspect the system for potential issues. 

Look for signs of potential issues, such as rust, cracks, or other damage to the aircon unit. Addressing these issues early on can prevent leaks from occurring.

4. Schedule regular maintenance and cleaning with Jing Yit. 


Regular maintenance and cleaning of your aircon unit can prevent leaks from happening. Trust the experts at Jing Yit to keep your aircon in tip-top shape.

Following these tips can avoid the headache and hassle of aircon leaks. Prevention is vital, so take care of your aircon unit to ensure it runs smoothly for years.

Final Thoughts


In conclusion, addressing aircon leaks as soon as possible is vital to avoid costly repairs and keep your aircon running efficiently. By following the tips we’ve provided, such as changing your air filters regularly and ensuring proper installation, you can reduce the risk of aircon leaks.

But even with proper maintenance, aircon leaks can still occur. That’s why it’s essential to trust a professional like Jing Yit for regular maintenance and professional services. With Jing Yit, you can enjoy a leak-free and efficient aircon experience.

Regular maintenance services can help prevent aircon leaks and other issues by ensuring your system runs at peak performance. Plus, our professional services can quickly and effectively address problems, saving you time and money in the long run.

So if you’re experiencing aircon leaks or any other aircon-related concerns, don’t hesitate to contact us. With our expertise and experience, you can trust us to keep your aircon running smoothly and efficiently!