What causes the air conditioner to leak water from the cold block?

Air conditioner leaking water in the cold block is a problem you are facing, causing a lot of trouble during use. But you do not know what is the cause of the air conditioner leaking water ? How to fix it? Find out with HACOM in the article below!

What causes the air conditioner to leak water from the cold block? Picture 1

Causes of air conditioner water leakage 

According to the experience of refrigeration technicians, the main cause of air conditioners leaking water is that the air conditioner's drainage system and the internal condenser are not cleaned and maintained. Over time, accumulated dirt clogs the drainage system, causing the air conditioner to leak water back inside. In addition, some causes of air conditioners leaking water can also be mentioned as:

Due to improper installation

Not only with old air conditioners, some customers when installing new air conditioners also encounter the situation of air conditioners leaking water in the cold block. With some inexperienced air conditioner technicians, poor skills in installing the cold block's drainage pipe if there is no standard slope, the pipe is too long without ventilation holes, it is easy to encounter this situation. 

What causes the air conditioner to leak water from the cold block? Picture 2

Dust filter is dirty

On the air conditioner's evaporator, when you open the plastic on the front, you will see a layer of dust filter. This dust filter has the effect of preventing dust in the air, making the cold air from the air conditioner fresher. But after a period of use, if not cleaned periodically, it will accumulate dust, causing the steam to not circulate properly, causing the air conditioner to leak water. 

What causes the air conditioner to leak water from the cold block? Picture 3

The drain pipe is clogged.

This is a situation that almost every family encounters, leading to the condition of the air conditioner leaking water. The water pipe accumulates dirt that is sucked in from the air conditioner through the drain. Over time, they increase and clog the pipe. When the environment is too humid, the large amount of wastewater that cannot be drained in time will cause the air conditioner to leak water back inside.

Air conditioner out of gas

Another reason why air conditioners and air conditioners leak water that many families often encounter is because the air conditioner is low on gas. This causes frost to occur and the condition of air conditioners leaking water is inevitable.

What causes the air conditioner to leak water from the cold block? Picture 4

How to fix air conditioner leaking water 

Based on the above causes, determining the reason why the air conditioner is leaking water will help you handle the problem very quickly and simply. More simply, apply the following methods to immediately handle the situation of air conditioner leaking water simply.

1. Clean the air conditioner regularly. If you use it regularly, you should clean the entire air conditioner every 3-6 months. Or if you live in the North, at the beginning of each summer when you start using it, you should clean the entire air conditioner.
2. Check the drain pipe for blockage. If there is, use a water pump to spray the pipe vigorously to remove dirt.
3. If your air conditioner is cooling poorly and is leaking water, add more refrigerant gas. 
4. Check the evaporator to see if the water tray is tilted or improperly assembled.

Above are all the causes and solutions for air conditioners leaking water that you can do yourself and handle at home. Most of the reasons come from improper cleaning of the air conditioner. To prevent air conditioners from leaking water, you should clean and maintain the air conditioner periodically every 3-6 months. If you cannot handle it thoroughly, call the repair center to completely fix this annoying situation!

Isabella Humphrey

Update 16 January 2025