5 Reasons Why Your Aircon Light Is Blinking - 81Aircon Servicing Company Singapore

5 Reasons Why Your Aircon Light Is Blinking - 81Aircon Servicing Company Singapore

Air conditioners look simple enough on the outside, but they’re truly complicated electrical appliances that can easily be affected by different issues. Problems like aircon blinking light and aircon water leak are common, but we’ll focus on the former in this article. 

In general, a blinking aircon light is a sign of something wrong with your air conditioner. It happens when your appliance identifies an internal error. Many brands come with this light function to inform you that there is this error that requires repair.

Read on to discover 5 reasons why Aircon Light Blinking and How to Fix Them

Refrigerant Leak

A refrigerant leak is a common problem where it involves leakage of your refrigerant gas. This gas is a key component of your air conditioner and helps it to function properly.

If your refrigerant levels are low, it may cause the condenser to freeze up and ultimately cause it to leak. Insufficient refrigerant can also damage the compressor and lead to a loud hissing sound. 

Frozen Evaporator Coils

Occasionally, you can perform a simple check to determine whether your evaporator coils are frozen. Simply pry open the front panel of your air conditioner and inspect whether a layer of ice has accumulated over them. 

If your evaporator coils are frozen over, it’s important to rectify it immediately with a professional technician’s help. This is because it can cause your air conditioner to leak water. This problem may also stem from a problem with the ducts.

Remember to turn off the air conditioner compressor immediately until the evaporator temperature increases.

Lack of Maintenance

Decided to skimp on maintenance to save yourself a few bucks? Doing so can lead to faults and malfunctioning. The blinking light can also be an indication that your air conditioner needs to be serviced. 

You can try to troubleshoot the problem yourself first if it’s minor and then get a qualified technician to fix it for you if that fails. 

Electric Fault

When an electrical fault occurs, it’s usually because of a damaged circuit board or electrical wiring. You can try to find the error code related to the blinking light to troubleshoot the problem first. 

Otherwise, you can check the PCB circuit board and see if there is moisture or water on it. If the unit is blowing air, the issue might be from within the unit. You can inspect to see if there is a blown part. 

Poor Air Circulation

If the light is blinking and your air conditioner is not delivering cold air, it might be because your unit is unable to circulate the air properly. This can be a result of an incorrect air conditioner placement or troubles with the aircon drive motor. The error code might be able to indicate the exact issue. 

Clogged Air Filters 

Clean air conditioner filters promote a functional air conditioner with a compressor that works smoothly. The air it blows out will also be clean and strong. Dirty air filters deliver dirty air riddled with unwanted substances and particles. It can also block the airflow. It also puts undue stress on your unit. 


You may worry when you see your aircon light flashing suddenly, but this is a common phenomenon that provides a reliable sign that something is wrong.

While the 5 reasons we listed above are some of the most frequent problem sources, there may be other less commonly known ones.

If you are unsure even after performing a check yourself, call the technicians at 81aircon to get an aircon servicing professional for an expert diagnosis!

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