What does your air conditioner fault code mean?
Seeing a code on your air conditioner’s remote, wall controller or indoor unit? Use the lookup below to find out what the fault code means, what commonly causes it, and what is safe to check yourself before you book a technician. We cover more than 1,000 fault codes across 15 brands sold in Australia, compiled from official Australian manufacturer and distributor documentation, including the service manuals our own technicians use.
How air conditioner fault codes work
Modern air conditioners run constant self-diagnostics. When a sensor reads out of range, a fan stalls or the indoor and outdoor units stop talking to each other, the system stores a fault code and shows it on the remote, the wall controller or as a pattern of flashing lights on the indoor unit. The code tells a technician where to start looking, which saves diagnosis time and gets your system running again sooner.
Three things worth knowing before you look up a code:
- Codes are brand-specific. An E1 on a Rinnai means something completely different to an E1 on an ActronAir, and some brands even reuse the same code with different meanings across product ranges. Always start from your brand.
- A restart clears some faults. Turning the system off at the isolator for five minutes resets the electronics. If the code does not come back, it was likely a one-off glitch. If it returns, the fault is real and needs attention.
- Some codes mean switch it off. Compressor, overcurrent and refrigerant leak codes can cause further damage if you keep running the unit. The lookup flags these as urgent.
Brands we cover
Every brand below has its own page with the full code table:
ActronAir, Braemar (including ducted gas heating and evaporative cooling), Daikin, Fujitsu General, Haier, Hitachi, Kelvinator, LG, Mitsubishi Electric, Mitsubishi Heavy Industries, Panasonic, Rinnai, Samsung, Temperzone and Toshiba. We are authorised warranty agents for Mitsubishi Electric, Hitachi and Temperzone: see Mitsubishi Electric repairs, Hitachi repairs and Temperzone repairs.
Every code in the lookup is checked against Australian documentation: the manufacturer’s own Australian website, their Australian distributor’s service manuals, or official manuals hosted by Australian industry bodies. Where a brand publishes no Australian fault table for a range, we say so rather than guessing from overseas lists, because the same code can mean different things in different markets.
What is safe to check yourself
Before you book anyone, these checks are safe on any system and fix a surprising number of faults:
- Turn the system off at the isolator or breaker, wait five minutes, and restart it
- Clean or replace the return air filters if they are clogged
- Check the outdoor unit is not blocked by leaves, dirt or garden growth
- Replace the remote’s batteries and check the display
Leave everything else to a licensed technician. Removing panels exposes mains voltage, and refrigerant work legally requires an ARCtick licence. If a code keeps returning after a restart, more restarts will not fix it.
More air conditioning help
Once you know what your code means, these guides and tools take you the rest of the way:
- Air conditioner repairs – how we diagnose and fix faults across Adelaide
- Repair or replace calculator – whether fixing your current system is the smarter money
- Service and maintenance – regular servicing prevents most of the faults in this lookup
- Air conditioner tripping the circuit breaker? – what it means and what to do
- Air conditioner freezing up? – causes and fixes for iced-up systems
- The R410A phase-out – what it means for repairing older systems
- Air conditioner installation – if the verdict is a new system
- Ducted price calculator and hi-wall price calculator – instant replacement pricing
- Sizing calculator and running cost calculator – get the next system right
- All tools and calculators
Fault code showing? Book a fault find
Our fault find covers a full diagnosis by a licensed technician, anywhere in Adelaide. We tell you exactly what has failed, what the fix costs, and whether repair or replacement is the smarter money. If you go ahead with the repair, the fault find is on us. If your system is beyond economical repair, see our air conditioner repairs page or use the repair or replace calculator.
Call us on 08 8296 7888 or book online and we will call or text you back ASAP.
Frequently Asked Questions
What does a fault code on my air conditioner mean?
It means the system’s self-diagnostics have detected a problem, such as a sensor reading out of range, a fan or compressor issue, or lost communication between the indoor and outdoor units. The code identifies which check failed. Use the lookup above to see what your brand’s code means and how serious it is.
How do I find the fault code on my air conditioner?
Depends on the brand. Most show a code on the remote or wall controller display. Some, like Fujitsu and Hitachi wall splits, flash the indoor unit’s lamps in a pattern instead, and some Panasonic remotes reveal the code when you press the CHECK button. The lookup above includes the alternative display forms where they exist.
Can I clear a fault code myself?
You can reset the system by switching it off at the isolator or breaker for five minutes. If the fault was a one-off, the code clears and stays gone. If the code returns, the underlying fault is still there and needs a licensed technician, and repeated resets can cause further damage on compressor and refrigerant faults.
My fault code is not in the lookup. What now?
Fault codes vary between model series, and some are only stored in the service menu. Take a photo of the display and book a fault find. Our technicians carry the full service manuals for every major brand sold in Australia.
Does a fault code mean I need a new air conditioner?
Usually not. Many codes point to fixable faults like sensors, capacitors, fan motors or drainage. Some, like compressor and refrigerant leak faults on older systems, can make replacement the smarter money. Our fault find tells you the honest answer either way, and the fee is credited if you repair with us.
How much does it cost to diagnose an air conditioner fault in Adelaide?
Our fault find is a flat upfront fee anywhere in Adelaide. That covers a licensed technician diagnosing the fault and quoting the repair. If you go ahead with the repair, the fault find is on us. Call 08 8296 7888 for the current fee.
Service Area
We service Adelaide and surrounding suburbs
Adelaide Hills, Burnside, Campbelltown, Charles Sturt, Gawler, Holdfast Bay, Marion, Mitcham, Norwood/Payneham/St. Peter, Onkaparinga, Playford, Port Adelaide Enfield, Prospect, Salisbury, Tea Tree Gully, Unley, Walkerville and West Torrens.
Fault code meanings vary between brands, model series and controllers, so treat this page as reference only and always cross-check against your unit’s manual. Compiled from Australian manufacturer and distributor documentation, correct at time of publication.
