Ducted aircond are a common sight in both homes and businesses throughout Malaysia. They provide comfortable cooling during our hot summers, and are a popular choice for many people. However, ducted aircond do require regular maintenance in order to keep them running at their best. A ducted aircond breakdown can cause a lot of problems for both homeowners and business owners, so it’s important to know what the most common causes of these breakdowns are.

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Bad Capacitor

A capacitor is an electrical component that stores energy in an electric field. It is used to maintain a potential difference between two electrodes, typically in capacitors and electronic motors. A bad capacitor can cause a ducted aircond to break down in a number of ways. For example, it can prevent the unit from starting up, or cause it to run inefficiently.

In some cases, a bad capacitor can even cause the unit to overheat and shut down. If you suspect that your ducted air conditioner may have a bad capacitor, it is important to have it checked out by a qualified technician. Otherwise, you may be putting your home at risk for serious damage.

Burnt Out Contactor

The contractor is responsible for controlling the flow of electricity to the air conditioner’s compressor. When the contractor fails, it can cause the compressor to overheat and eventually burn out. In most cases, replacing the contractor is all that is needed to fix the problem. However, in some cases, the damage may be more extensive and require a new compressor.

It could also be caused by a faulty electrical connection. You should have a qualified aircond specialist to check your system if you suspect that the contractor may be the cause of your problem.

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Dirty Air Filters

Most aircond have a filter that needs to be regularly changed in order to keep the unit running smoothly. A dirty filter can cause a number of problems, including aircond breakdown. When the filter is clogged, it reduces the airflow and puts extra strain on the system. This can lead to overheating and eventually break down the entire unit. Additionally, a dirty filter can also lead to poor indoor air quality as it allows dust and other airborne particles to circulate through the home. For these reasons, it is important to keep the air filters clean and replaced on a regular basis. Doing so will help to prevent a ducted aircond breakdown and ensure that the unit runs effectively.

Evaporator Coil Issues

As any homeowner with a ducted air conditioner knows, this type of aircond unit is composed of numerous parts, all of which must work together in order for the system to function properly. The evaporator coil in a ducted aircond draws heat out of the air that passes through it, and as such, it plays a critical role in the cooling process. Unfortunately, evaporator coils are also susceptible to a variety of issues that can eventually lead to a ducted AC unit breakdown. Some common issues that can affect evaporator coils include corrosion, leaks, and frozen coils.

In some cases, these issues can be repaired; however, in other cases, the only solution may be to replace the entire coil. As a result, it is important to be aware of these potential problems so that you can take steps to prevent them or have them fixed as soon as possible if they do occur. For example, if you notice that your evaporator coil is leaking, it is important to have it checked out as this could be indicative of a more serious problem.

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Failing Compressor

As the name suggests, the compressor in a ducted aircond unit is responsible for compressors the refrigerant. Failing compressor issues are one of the top causes of a breakdown. The compressor is the ‘engine’ of the air conditioner and it pumps refrigerant gas around the system. If there is a problem with the compressor, it can cause the entire system to spoil. One of the most common problems with compressors is that they can leak refrigerant gas. This is because the compressor has a lot of moving parts and over time, these parts can wear out and start to leak.

Another problem that can occur is that the compressor can overheat. This can happen if the compressor is not properly lubricated or if it is working harder than it should be. If the compressor overheats, it can cause the aircond to break down. In serious cases, the compressor can even catch fire and cause damage to the entire unit. As you can see, a failing compressor is a serious problem that should be addressed as soon as possible.


Ducted aircond units are complex pieces of machinery, and as such, they can be susceptible to a variety of issues that can eventually lead to a breakdown. Some common problems that can cause a ducted aircond unit to break down include dirty air filters, evaporator coil issues, and failing compressors. Taking steps to prevent these problems or to have them fixed as soon as possible is the best way to keep your ducted aircond unit running smoothly.