Mitsubishi Aircon Light blinking – A Complete Guide by Above All Aircon
If your Mitsubishi aircon light is blinking, you’re not alone. It’s one of the most common air conditioning issues that homeowners in Singapore search for every month.
But what exactly does that blinking or that orange, green, or red light really mean? Don’t worry, Above All Aircon is here to help you understand and fix it.
What the Blinking Light Colors Mean
Different colors of the blinking light on your Mitsubishi air conditioner indicate different types of problems. Here’s a simple guide:
| Light Color | What It Usually Means | Action You Can Take |
| Green Light Blinking | System error detected – could be a filter, fan, or airflow issue. | Try cleaning filters, then reset the unit. If it continues, call a technician. |
| Orange / Yellow Light Blinking | Timer or maintenance indicator – often means it’s time for servicing. | Schedule a regular maintenance session with Above All Aircon. |
| Red Light Blinking | Major error – possibly compressor, PCB, or power supply fault. | Turn off the Aircon and call a professional immediately. |
| No Light or Constant Light | The unit may be in standby, or the LED is faulty. | Check the power supply and remote settings. |
💡 Pro Tip: Some Mitsubishi models show a specific blink pattern (e.g., blinking 4 times or 6 times). The number of blinks corresponds to a specific error code.
Common Reasons for Mitsubishi Aircon Light Blinking
1️⃣ Dirty or Blocked Air Filter
When airflow is restricted, the system overheats and triggers the blinking light.
Solution: Clean or replace your air filter every few months.
2️⃣ Faulty Temperature or Pressure Sensor
Sensors detect temperature and refrigerant pressure. If they malfunction, the unit blinks to alert you.
Solution: Requires a technician diagnosis. Above All Aircon can test and replace sensors quickly.
3️⃣ Low Refrigerant (Gas Leak)
Low gas pressure causes the system to underperform and blink an error.
Solution: Only a licensed Aircon technician should top up or fix leaks safely.
4️⃣ PCB (Printed Circuit Board) or Electrical Fault
The blinking could indicate an issue with the indoor or outdoor unit’s PCB.
Solution: Turn off the unit and call us for a full inspection.
5️⃣ Drainage or Installation Problems
Blocked drainage can cause water to backflow or trigger a blinking error.
Solution: Clean the drainage pipe regularly and ensure proper installation.
Quick Reset Steps You Can Try
Before calling for help, try these simple steps:
- Turn off your Mitsubishi air conditioner using the remote.
- Switch off the power supply from the circuit breaker for about 5–10 minutes.
- Clean the air filters gently with water and let them dry.
- Restart the unit and check if the light stops blinking.
If it still blinks especially red or rapidly flashing call Above All Aircon immediately.
When You Should Call a Technician
- The blinking light returns after a reset.
- The unit stops cooling or blows warm air.
- You see water dripping from the indoor unit.
- There’s a burning smell or strange sound.
- Multiple lights (green, orange, red) are flashing in sequence.
Our team at Above All Aircon can perform a full fault-code diagnosis and identify the exact cause in a single visit.
Why Choose Above All Aircon, Singapore?
- Certified Mitsubishi specialists – We know every model inside and out.
- Transparent pricing – No surprise charges.
- Fast response anywhere in Singapore – HDB, condo, or landed home.
- Genuine parts & long-term solutions – Not just quick fixes.
- Friendly, professional service – Because comfort shouldn’t be stressful.
Need Help with Your Mitsubishi Aircon Light Blinking?
If your green, orange, or red Mitsubishi air conditioner light is blinking, don’t wait until it stops cooling.
Let Above All Aircon Singapore handle it professionally and affordably.
👉 Call or WhatsApp us today for quick, reliable service anywhere in Singapore.
Stay cool, stay comfortable with Above All Aircon, your trusted Mitsubishi Airconditioning partner.