If you’re experiencing a blinking light on your air conditioner, it can be frustrating and may even indicate a problem with the unit. In this blog, we’ll explore some of the common reasons for an aircon light blinking and discuss how to stop it from happening.
Aircon Light Blinking – What It Means & How to Fix It
When your aircon light starts blinking, it is a warning sign from the system. Many air conditioners use blinking lights to show that something is wrong, even if the unit is still running. In Singapore, this issue is very common due to dust, humidity, and heavy daily usage.
Understanding the cause early can help prevent bigger and more expensive repairs.
Common Reasons Why the Aircon Light Is Blinking
1. Dirty Air Filter or Fan Coil
Dust buildup restricts airflow and causes the system to work harder.
What happens:
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Weak cooling
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Aircon light blinks
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The unit may shut down automatically
How to fix:
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Clean air filters regularly
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Do normal aircon servicing if dirt buildup is heavy
2. Water Leakage or Choked Drain Pipe
A blocked drain pipe can trigger the blinking light as a safety warning.
What happens:
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Water dripping from the indoor unit
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Blinking or flashing light
How to fix:
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Drain pipe flushing
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Chemical wash if the blockage is serious
3. Sensor or Temperature Error
Faulty sensors send incorrect readings to the system.
What happens:
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Aircon turns on and off by itself
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Blinking light continues
How to fix:
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Sensor checking and replacement by a technician
4. Electrical or PCB Board Issue
Power surges or aging parts can damage internal components.
What happens:
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Continuous blinking
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Aircon cannot start
How to fix:
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Professional inspection
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PCB repair or replacement if needed
5. Gas Leak or Low Refrigerant
Low gas pressure affects cooling performance.
What happens:
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Blinking light warning
How to fix:
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Leak detection
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Gas top-up only after repair
How to Reset Aircon Blinking Light
You may try a basic reset:
1. Turn off the aircon
2. Switch off the main power
3. Wait 5–10 minutes
4. Turn it back on
If the light continues blinking, servicing is required.
When to Call Letscool Aircon
You should contact Letscool Aircon if:
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The blinking light does not stop
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Cooling performance drops
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Water leakage appears
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Aircon shuts down automatically
Early servicing helps avoid major breakdowns.
How To Stop Aircon Light Blinking
- Clean or replace the air filter regularly.
- Check and reset the circuit breaker or fuse box if necessary.
- Clear any debris from around the outdoor unit.
- Make sure the thermostat is set correctly and the unit is turned on.
- Try unplugging the air conditioner and then plugging it back in to reset the unit.
If none of these steps fix the issue, it may be a more serious problem that requires professional repair. It’s best to call a technician if you are unable to fix the issue on your own or if the problem persists after trying these steps.
In conclusion, there are several reasons why an air conditioner light may be blinking. By following these steps, you may be able to fix the problem yourself. However, if the issue persists or is a more serious problem, it’s best to call a professional technician to diagnose and repair the issue.
Letscool aircon provides all kind of aircon servicing and repair such as water leakage, aircon not cooling, noisy problem, repair and troubleshoot
Conclusion
A blinking aircon light is a warning that should not be ignored. While some causes are minor, others need professional attention. Regular maintenance keeps your aircon running efficiently and prevents unexpected failures.
For reliable aircon servicing and repair in Singapore, Letscool Aircon is here to help.
