A Fujitsu air conditioner shows an error code when the indoor or outdoor unit detects a fault. With a wired wall controller the code appears on the display, and with a wireless remote the indicator lamps on the indoor unit blink in a pattern. Common codes include 11 or E:EE (indoor and outdoor units not communicating), 41 (room temperature sensor), 53 (drain or float switch) and 97 (outdoor fan motor). Sydney Appliance Service stocks Fujitsu air conditioner parts and carries out air con repairs across Sydney.
Fujitsu General Australia changed its trading name to GENERAL Australia on 1 January 2026, so newer manuals and support pages call these systems General Airstage (formerly Fujitsu). Below is how to read the code, what the lights and codes mean, what you can safely check yourself and when to call a technician.
How do I check the error code on a Fujitsu air conditioner?
It depends on your controller. GENERAL Australia explains it this way:
- Wired wall controller: the error code appears directly on the controller display.
- Wireless remote: the code shows as a blinking pattern on the indoor unit’s lamps. On many models you can also put the remote into Service check mode to show the code as 2 numbers or letters. The indoor unit beeps once each time the shown code changes, and beeps several times with all lamps blinking when it reaches the code that matches the fault. If it beeps several times at “00”, no error has been detected. Your operating manual shows which button to press.
Write the code down before you reset anything. A technician needs it to find the fault.
What do the flashing lights on a Fujitsu air conditioner mean?
A Fujitsu wall split has three lamps on the indoor unit: Operation (green), Timer (orange) and Economy (green). Not every flashing light is a fault. These patterns come from GENERAL’s operating manuals and can vary by model:
| What you see | What it means | What to do |
|---|---|---|
| A lamp blinks in Heating mode and the indoor unit stops blowing | Automatic defrosting of the outdoor unit | Wait. The indoor unit can stop for up to 15 minutes, then heating resumes |
| A lamp blinks 3 times, repeating | Filter sign, time to clean the air filters | Clean the filters and reset the filter sign |
| A lamp blinks twice, repeating | Demand response mode (an arrangement with your electricity company) | Normal, the unit runs at reduced power for a while |
| Timer lamp blinks slowly | Timer setting error, usually after a power cut | Set the clock and timer again |
| Operation and Timer lamps blink while the Economy lamp blinks fast | An error code is being shown | Turn the unit off at the breaker and call a technician with the code |
Fujitsu air conditioner error codes and what they mean
These are common Fujitsu codes as shown on a wired controller. Codes can vary by model and controller, so if yours isn’t here, call us on (02) 9546 4444 with the code and the model number of both the indoor and outdoor unit.
Communication and power errors
| Code | What it means | Likely cause |
|---|---|---|
| E:EE or 11 | Communication error between the indoor and outdoor units | A break in the signal wire between the units, or a power surge |
| 12 or E0:00 | Wired remote controller error | A wiring disconnection or a bad circuit board connection at the wall controller |
| 26 or 08 | Power source or address error | Irregular voltage, or an incorrect setting on the indoor unit |
Indoor unit errors
| Code | What it means | Likely cause |
|---|---|---|
| 41 or E2:00 | Room temperature sensor (thermistor) fault | A faulty room temperature sensor |
| 42 or E4:00 | Heat exchanger sensor fault | The indoor coil temperature sensor has failed (open or short circuit) |
| 51 | Indoor fan motor fault | The indoor fan motor is locked or jammed, or the fan circuit on the circuit board has failed |
| 53 or 09 | Drain water or float switch error | A blocked condensate drain line, slime in the drain, or a faulty float switch |
| OP or OL | Overload or overcurrent | A badly blocked air filter or coil restricting airflow |
Outdoor unit and refrigerant errors
| Code | What it means | Likely cause |
|---|---|---|
| 62 or E1 | Outdoor unit main circuit board error | Control board failure in the outdoor unit |
| 71 or EF | High discharge temperature | Low refrigerant from a gas leak, or the compressor running too hot |
| 86 or EE | High pressure fault | Outdoor fan failure, blocked outdoor fins, or extreme summer heat |
| 95 or E6 | Compressor control error | Compressor trip, thermal overload, or a failed inverter module |
| 97 | Outdoor fan motor fault | Outdoor fan motor failure, or debris such as leaves or a wasp nest jamming the fan blade |
What can I check myself before calling a technician?
Start with these quick checks:
- Power: make sure the circuit breaker hasn’t tripped.
- Remote: replace the batteries and check it’s set to Cool or Heat, not Fan or Dry.
- Filters: slide out the indoor filters, wash them, let them dry completely and refit them. Blocked filters are a common cause of OP and OL.
- Vents and outdoor unit: clear furniture or curtains from the indoor vents, and leaves, grass clippings or stored items from around the outdoor unit. Leave 30 to 50 cm of clear space around it.
- Drain: for a 53 code, check the end of the drain pipe outside isn’t blocked by dirt, algae or an insect nest.
Never open the indoor or outdoor unit or touch wiring. GENERAL advises contacting a licensed technician for any electrical or internal fault.
How do I reset a Fujitsu air conditioner?
GENERAL Australia recommends turning off the isolation switch on the air conditioner for at least five minutes, then turning it back on. This often clears minor faults caused by power outages, such as a communication error after a storm.
If the lights keep flashing or the code comes back after a reset, the unit has a real fault that needs a technician. Restarting it over and over won’t fix it.
When should I turn my Fujitsu air conditioner off straight away?
GENERAL’s operating manuals say to stop the air conditioner and turn off the electrical breaker if the unit smells of burning or gives off smoke, if water leaks from the unit, if an error code is showing, or if a problem continues after you’ve done the checks above. Then contact a licensed technician.
Is my Fujitsu air conditioner still under warranty?
GENERAL Australia provides a 5 year full parts and labour warranty on domestic air conditioners sold in Australia. For a warranty claim they ask for the indoor and outdoor unit model numbers, who supplied and installed it, and the supply and install dates. If you’re in Sydney, GENERAL’s service line is 1300 658 840.
Out of warranty, GENERAL says you can use your own licensed technician. We carry out air con repairs across Sydney: call (02) 9546 4444 or book a service online.
Fujitsu air conditioner parts
Most of these codes point to one part: a sensor (thermistor), an indoor or outdoor fan motor, a circuit board, a remote or wall controller, or a drain part. We stock Fujitsu air conditioner parts, including:
- Room, coil and outdoor thermistors (codes 41 and 42), for example the outdoor heat exchanger thermistor 9901114007
- Indoor fan motors (code 51), for example indoor fan motor 9602704002
- Outdoor fan motors (code 97), for example the outdoor DC brushless fan motor 9603794019
- Indoor and outdoor circuit boards (codes 62 and 51)
- Remote controls and wired wall controllers, for example the AR-WAH1E wired wall controller, and wireless remotes such as the AR-REF1E remote
- Drain pans and hoses (code 53)
To get the right part, check the part number on your old part, or send us your model number and a photo through the parts enquiry form. We can also source stock lines within 1 to 3 business days, subject to availability. Parts carry a 3 month warranty (plastic shelving and cosmetic accessories excluded), and parts must be fitted by a licensed electrician (see parts warranty).
Related guides
- All appliance error code guides
- Air conditioner parts in Sydney
- Why your air con feels weak and how a new filter can fix it
- Simple signs your air con needs a new thermistor
- How to pick the right air con remote control
Frequently asked questions
How do I check the error code on my Fujitsu air conditioner?
With a wired wall controller the code shows on the display. With a wireless remote, the lamps on the indoor unit blink in a pattern, and on many models the remote’s Service check mode shows the code as 2 numbers or letters.
What does a flashing light on my Fujitsu air conditioner mean?
Not always a fault. One blinking lamp can mean defrosting, a filter reminder or demand response, but if the Operation and Timer lamps blink while the Economy lamp blinks fast, an error code is showing.
What does error 11 or E:EE mean on a Fujitsu air conditioner?
The indoor and outdoor units have stopped communicating, usually from a break in the signal wire or a power surge. Turn the isolation switch off for at least five minutes, and if the code returns, call a technician.
What is Fujitsu air conditioning called now?
Fujitsu General Australia changed its trading name to GENERAL Australia on 1 January 2026, and its systems are now sold as General Airstage (formerly Fujitsu).
How do I reset my Fujitsu air conditioner?
Turn off the isolation switch on the air conditioner for at least five minutes, then turn it back on. If the error comes back, the unit needs a technician.