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Common Problems

Why Is Your Aircon Dripping or Leaking Water and How to Fix It

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Cool, convenient and comfortable, an air conditioner is one of the most important appliances in any house or office. But for a tropical country like Singapore, this is an essential (and culturally significant) piece of machine that keeps everyone going in the face of extreme heat. Whether at home, school or at the office, Singaporeans turn to an aircon to keep them cool and comfortable all day.

But what if the cool and crisp air that you expect from the aircon is accompanied with leaking or dripping water every time you turn it on? That sure sounds like a nightmare, right? In this article, we discuss the common causes behind an aircon leaking or dripping water and several ways you can do to check the issue.


Why Does Water Form in Your Air Conditioner?

Before we dive deeper into the possible causes behind the issue, it’s important to understand first how exactly water forms in the air conditioner.

Your air conditioner has an evaporator coil that is responsible for cooling the warm air blown into it. Because of this process, condensation or moisture begins forming on the coil in the form of water beads or droplets. This moisture then makes its way into a drain pan and down further the condensate drain line that leads to the outside of your house. So you might ask yourself, how can this potentially lead to the problem of an air conditioner dripping or leaking water? The answer is, well, a handful.

Also read: Common Aircon Problems that Owners Experience


7 Common Causes of an Aircon Leaking or Dripping Water

1. Drain line is clogged


The most common reason behind a leaking or dripping air conditioner is a clogged condensate drain line. This usually happens when the drain line gets clogged with dust, dirt, sludge or mold formations. As a result, the piping starts overflowing with water and causes the unit to leak or drip.

If the water is coming out of the front of the unit, there’s a good chance that it has been installed improperly. You will need to take out the actual unit and reinstall it correctly to stop the leaking. For water that’s leaking out of different parts, check the tubing for any blockage.

For most cases of clogged drain lines, it’s always recommended to contact an air conditioner servicing company or a technician for professional vacuuming and unclogging.

2. Overflow pan is broken


Another culprit behind an aircon leak is a damaged overflow pan. These pans are responsible for catching the condensation formed when warm air passes over cold evaporator coils. So when there’s a hole, crack or any fissure on the pan’s surface, water can easily trickle down into your floor.

To fix this problem, treat any opening — big or small — on the pan by applying epoxy and letting it dry. If this doesn’t work out, consider replacing the actual pan with a new one.

3. Air filter is full of dirt


Yes, a dirty filter can actually cause a water leak in your aircon unit. Surprising? Not quite. Once a unit’s filter becomes full of dust and other formations dirt, it has a hard time purifying the air that you breathe in your room. As a result, the air around the evaporator coils becomes too cold and freezes them. The frozen evaporator coils then make way for the formation of ice, causing it to eventually melt and leak outside the unit.

So how do you avoid running into this problem? Always clean and replace your aircon filters on a regular basis. If you’re unsure of how to go about it, a skilled air conditioner technician can always do the trick for you.

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Did you know that a dirty aircon filter can also be the reason why your aircon is not blowing cold air? Yes, that's right. Having a dirty filter can cause more than one issue. To learn more about how unclean filter affects cool air, click here.

4. Unit was incorrectly installed


Is your new air conditioner unit already leaking or dripping water? If you answered yes, then you might have a case of an incorrect installation. Naturally, a newly installed unit would rarely run into a drain line or filter problem that can cause the leak. But when a unit is not in the right level nor has it been sealed properly, the problem of water coming out is bound to happen sooner than later.

5. Aircon has a damaged pump


A damaged or broken aircon pump can usually result in the inability of the drain line to absorb the water from the overflow pan. Once this happens, the plan will overflow and any excess water will start leaking out right away. Check the drain line for any sign of damage or opening to address the problem right away. If you notice that water from the overflow pan has difficulty getting drained, then you’re dealing with a broken pump.

To ensure the extent of the pump’s damage, it’s best to call an experienced aircon technician. He can then advise you whether to get a new one or make quick fixes to the damaged area.

6. Condenser coil is leaking


An aircon water leak can also be caused by a problem with the condenser coil. Usually located outside the house, the condenser unit of an air conditioner is made up of three main parts: the blower fan, the compressor and the condenser coil. Once dust and dirt makes their way inside the unit, the condenser can have a more difficult time due to stuck debris inside the system. When this happens, the condenser coil and the piping system become more prone to leaking or dripping.

If this is the case, the best way to handle it is by contacting an aircon professional or a servicing company

7. Aircon is suffering from low refrigerant levels or leak


A low refrigerant level in your aircon will lower the pressure in the unit’s system, causing the evaporator coil to freeze over. Once this happens, the ice can melt and water can flood the drain pan. Apart from cooling problems, another tell-tale sign that you’re experiencing this issue is when you start hearing any bubbling or hissing sound while the AC is running.

There’s no better way to fix this problem than to seek professional help from a skilled aircon technician or repair company.


Keep Your Aircon Free From Water Leaks

Once you encounter the problem of an aircon leaking water, act on the issue by finding out the cause and have it fixed by a professional right away.

Apart from repairing an air con leak, solving other aircon-related problems in a fast and efficient manner can help in prolonging your unit’s lifespan. If you happen to run into any of these problems, contact us here at Luce Aircon right away. We provide the complete range of aircon repair and maintenance services — all at a competitive price that feels right.

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Staff Writer

Staff Writer

This article is written by our passionate staff writers who seek to share our knowledge from our business

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