11 Reasons Why Your Aircon Is Leaking Water And How To Fix It

Aircon is an essential home appliance for many Singapore households, especially in the local climate and many homeowners wonder why their aircon is leaking water. Without regular aircon servicing, internal components can accumulate dirt and blockages over time. This often leads to issues such as aircon leaking water, which can damage nearby furniture, create slipping hazards, and lead to higher electricity usage if left unresolved. Understanding the causes behind this issue and how to address it helps homeowners respond quickly and avoid further complications.

Reasons for Aircon Leaking Water

1. Dirty Air Filters

Many homeowners overlook their air filters until problems start to appear, but they play a significant role in causing water leakage. When the filter becomes clogged with dust, it restricts airflow across the evaporator coil, which can cause it to freeze. As the ice melts, excess water may overflow and lead to leakage from the unit. This is why it is important to clean aircon filters before the issue worsens and leads to further complications.

2. Clogged Drain Line

Clogged drain lines are some of the common reasons why the air conditioner starts leaking. This is the pipe that receives the condensate from the drain pan and sends the excess outside. The drain pipe can be clogged with dirt due to the lack of proper aircon cleaning, and thus cause a backflow of the water collected in the drainage tray. This is commonly diagnosed if the aircon leak seems to start at the back of your aircon. As this part is inaccessible to you and requires some aircon repair, get a professional aircon service company to help you unclog it.

3. Poor Maintenance

An air conditioner, like any home appliance, requires regular aircon servicing to stay in good working condition. Without proper aircon cleaning and maintenance, the system becomes more prone to issues such as water leakage. If you plan to do your own aircon servicing, it is important to pay attention to these aircon parts that require periodic care, such as the air filters, evaporator coil, and drainage system.

4. Improper installation

If you are having a new air conditioner unit and you notice there are some water leakages, then it is most likely due to a faulty aircon installation, not the filters and drain lines. The incorrect aircon installation is what has caused water leakage. Therefore, you should start by checking if the air-conditioner was installed on a flat surface. This is because it needs to be installed at a slight downward angle for the water to drip off easily. Additionally, you should check if the seals are properly fitted because if not then the warm air from the outside will meet with the cold air from the condenser leading to condensation which contributes to leakages.

This is a major issue that needs professional servicing. You should engage a reputable aircon service company that does aircon installations to come to have a look.

5. Air Leak

Water leaks can occur as a result of an air leak. This is when warm air entering the installed aircon fails to pass through the vent. As a result, moisture condenses on the refrigerant coils which leads to water seeping out of the unit. In some cases, an air leak can occur as a result of loose seals. Engage an air conditioning service to repair or replace them if that is the case.

6. Low Levels of Refrigerant

Refrigerant coolants help to cool the warm air and blow it out for your comfort. If there is not enough gas, then the aircon will not blow cold air, and the air might fail to condense on the evaporator coil, leading to your aircon leaking water. You might also hear some bubbling noise or hissing sound which indicates that there is a likelihood that the aircon coolant is leaking and you need an aircon repair immediately. You will simply need an aircon gas top up, but if you suspect that the aircon leaking water may be leaking refrigerant instead.

7. Broken Condenser Pump

A damaged condenser pump is one common reason why aircon leaks water. This component is located below the cooling oil and pumps out all the water from the condenser pan. In certain cases, this can malfunction due to dirt buildup. But if the inside of your Daikin or Mitsubishi aircon’s condenser pump appears to be clean, then it’s possible that one or more of its components might be damaged. Otherwise, check if the power supply connected to the pump might have been cut off. To confirm if your pump is working properly, you should see water being released into the condenser pan. If the condenser pan appears empty, have your condenser pump repaired or replaced immediately.

8. Damaged Drain Pan

The drain pan is designed to collect condensation from the system, but when it becomes damaged or worn out, it can lead to water leakage. Over time, the metal tray may develop rust or corrosion, which can create small gaps that allow water to escape instead of being properly drained. Since the drain pan is not easily accessible and often requires careful handling, it is advisable to opt for professional aircon repair over DIY solutions in Singapore to properly assess and resolve the issue.

9. Outside Temperature is Too Cold

10. Frozen Evaporator Coils

11. Leakage in the Condenser Coil

DIY Aircon Cleaning Tips for Minor Issues

If the issue is minor, basic DIY cleaning may help reduce water leakage caused by dirt buildup. However, it is important to avoid common mistakes people make during DIY aircon servicing, such as skipping proper checks or handling components incorrectly. Start by switching off the aircon and disconnecting the power supply. Remove the cover to check for blocked vents, inspect seals for any gaps, and look at the drain pan for dirt accumulation.

Clean accessible parts using a brush, and apply a mild cleaning solution for stubborn buildup. Once done, dry all components thoroughly before reassembling the unit. After restarting the aircon, monitor if the leakage has stopped. If the issue continues, professional servicing may be required.

How To Avoid Aircon Leaking Water Issues

To avoid aircon leaking water issues, regular upkeep plays a key role. Routine checks help identify dirt buildup or early signs of wear before they develop into leaks that may later require aircon repair. Cleaning air filters and keeping drainage components clear can reduce the chances of blockages that lead to water overflow. It is also helpful to monitor for unusual signs such as weak airflow or moisture around the unit. When needed, engaging a professional for regular servicing helps keep the system in proper condition and reduces the likelihood of recurring leakage problems.

Hiring A Professional Aircon Service Company

Conclusion

DW Aircon Servicing Singapore provides an extensive range of Aircon Services including Aircon Servicing, Aircon Repairs, Aircon Installation of the best aircon brands,  Chemical Overhaul, Gas Top-up, Aircon Leaking Water, Aircon Not Cold Fix, and more. We have a team of professional technicians who are equipped with vast knowledge and experience in the Aircon industry. We have over 10 years of experience in dealing with aircon works and have completed thousands of aircon works for both residential (Landed, Condo, and HDB) and commercial. We are a highly recommended Aircon Company in Singapore, with many delighted customers and reviews over the years on Google and Facebook. WhatsApp us at +65 8241 0032 for transparent quotation and honest pricing for all your aircon needs. We offer a fast and efficient service to serve any of your aircon needs!