What Do AC Flashing Lights Mean?

If a Fujitsu AC has flashing lights, an error code or unusual performance, try a manual reset first. To let the system completely power down, we recommend firstly turning the isolation switch off on the air conditioner for at least five minutes. This action frequently fixes minor internal mistakes or temporary problems brought on by power outages. The unit could start running normally and stop showing any warning signals once the switch is turned back on.

If this does not work and the system is still within the warranty period, please visit our Fujitsu air conditioning service. If you live in Sydney, Melbourne, Brisbane, Adelaide, Perth or Townsville call: 1300 658 840. If you live outside these areas, call: 1300 364 484.

If the unit is out of the warranty period, you can choose to use your own preferred licensed technician to diagnose and repair the air conditioner. Ensure they are knowledgeable about Fujitsu products, especially if they need to access internal diagnostics or interpret LED fault indicators. Acting quickly helps keep your system running effectively and prevent further damage.

Why is My Air Conditioner Light Blinking?

If you notice the timer light flashing on your Fujitsu air conditioner, the unit may have detected a fault that requires maintenance attention. The Fujitsu fault codes and flashing lights can communicate a range of system alerts. A flashing green or orange light can signal issues like blocked filters, low refrigerant or fan malfunctions. These lights often correspond to internal fault codes, which help technicians diagnose the problem. If the LED continues to flash after a reset, refer to your user manual or the Fujitsu website for guidance. You should also watch for a consistent blinking pattern, as this may help identify the fault.

Error Codes - An Air Conditioner Flashing Orange Light or Green Light

The wall mounted unit displays three indicator lights: Operation (green), Timer (orange), and Economy (green). During normal operation, one or more of these lights will be illuminated, depending on the specific function you are utilising. If all three indicator lights begin to blink in a specific pattern, it could indicate an error or another system fault. If you're using a wireless remote controller, error codes will be shown through blinking patterns on all three LED lights. With a wired remote controller, error codes appear directly on the remote display. If you encounter either of these light signals or error displays, we recommend contacting a service technician to help check and identify the cause.

If the AC flashing lights continue and performance declines, please consult your air conditioning manual or seek advice from a licensed electrician. 

If your system is frequently breaking down or no longer running efficiently, it may be time to replace your AC unit with a newer, more energy-efficient model.

Air Conditioner Light Flashing: When Assistance is Needed

While an air conditioner light flashing is not always cause for concern, it can indicate that your system requires maintenance, particularly if the unit is not running as it should. With our built-in diagnostic features and expert support network, you can restore comfort quickly and confidently.

Need help with your Fujitsu air conditioner? Get in touch with our trusted service team for expert support, troubleshooting or to book a maintenance check — we’re here to keep your comfort running smoothly.