If your aircon light is blinking, it’s a warning sign that something is wrong with the system. Many homeowners in Singapore face this issue and are unsure whether it’s serious or not.
In this guide, we explain what aircon light blinking means, common causes, simple resets, and when to call a professional aircon technician.
What Does Aircon Light Blinking Mean?
A blinking light on your air conditioner usually indicates:
- A system error
- Sensor or communication issue
- Dirty filter or coil
- Power or voltage problem
Most modern aircons use blinking lights to show error codes and protect the system from damage.
Common Causes of Aircon Light Blinking
Dirty Air Filter
One of the most common and easily fixable reasons.
Symptoms
- Weak airflow
- Poor cooling
- Blinking operation light
Solution
Clean the air filter every 2–4 weeks.
Indoor & Outdoor Unit Communication Error
Causes
- Loose wiring
- Power fluctuation
- PCB board issue
Fix
Switch off the aircon and main power for 10–15 minutes. If blinking continues, professional repair is required.
Low Refrigerant (Gas) Level
Signs
- Aircon not cooling
- Light blinking continuously
- Ice forming on pipes
Solution
Gas top-up must be done by trained technicians only.
Sensor or Thermistor Problem
A faulty temperature sensor can trigger continuous blinking.
Fix
Sensor testing and replacement by professionals.
Power Supply or Voltage Issue
Sudden power trips or unstable voltage may cause the aircon light to blink.
How to Reset Aircon Blinking Light
Simple Reset Steps
- Turn off the aircon
- Switch off the main power
- Wait 10–15 minutes
- Turn power back on
If the aircon light keeps blinking after reset, servicing is needed.
Is It Safe to Use Aircon When the Light Is Blinking?
No. Continuous blinking means the system is protecting itself. Continued use may cause compressor damage or higher repair costs.
Professional Aircon Light Blinking Repair in Singapore
At Above All Aircon, we provide:
- Aircon troubleshooting
- Error code diagnosis
- Sensor & PCB repair
- Gas top-up
- Full aircon servicing
We serve HDB, condos, offices, and commercial spaces across Singapore.
How to Prevent Aircon Light Blinking
- Regular aircon servicing
- Clean filters monthly
- Avoid power overloads
- Schedule professional checks every 3 months
Why Choose Above All Aircon?
- Experienced local technicians
- Fast response across Singapore
- Affordable & transparent pricing
- Trusted aircon specialists
🌐 Visit: https://aboveallaircon.com.sg/
Frequently Asked Questions – Aircon Light Blinking
Why is my aircon light blinking?
Aircon light blinking usually indicates a system error, dirty filter, low gas, sensor issue, or communication problem.
Can I reset my aircon if the light is blinking?
Yes. You can try turning off the unit and main power for 10–15 minutes. If blinking continues, professional servicing is required.
Is aircon light blinking dangerous?
It can be if ignored. Continued use may damage internal components and increase repair costs.
Does low gas cause aircon light blinking?
Yes. Low refrigerant gas can trigger system protection, causing the indicator light to blink.
Do you provide aircon blinking light repair in Singapore?
Yes. Above All Aircon provides professional aircon repair and troubleshooting services across Singapore.