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Daikin Air Conditioner A6 Error Code
Indoor fan motor fault. Here is what it means and how to clear it, easiest fix first.
The indoor fan isn't turning at the speed the control board expects, or has stopped. Causes include a failed or locked fan motor, a damaged or unplugged motor harness, or a fault on the indoor board.
Daikin uses this code across its residential split, SkyAir and VRV ranges, but the exact meaning and causes can vary by series, model year and region, so confirm it in your unit's manual. How to read it: most Daikin ductless wall units only blink the operation lamp. On remotes such as the ARC433 series, press and hold the timer Cancel button for roughly 5 seconds until 00 blinks on the screen, then press Cancel again one step at a time; when the indoor unit answers with a long continuous beep, the code showing is the stored fault. SkyAir and VRV wireless remotes use a different sequence with the Inspection/Test, up/down and MODE buttons, and wired wall controllers usually show the code on their screen.
How to fix Daikin A6
Check the air filters
Turn the system off and switch off its breaker. Lift the front panel, take out the filters and make sure they are clean and were seated properly, since a filter that has slipped out of place can foul the fan. Refit them and close the panel. Don't reach into the air outlet or try to turn the fan by hand.
Reset the power at the breaker
Switch the system off with the remote, then turn off its circuit breaker in your home's main panel. Wait about 5 minutes, switch the breaker back on and restart the unit. If the code returns within a few minutes, write it down for the technician.
When to call a technician
If the fan stays still or A6 returns, the fan motor or its circuit needs diagnosis by an HVAC technician.
Parts that commonly cause A6
- indoor fan motor
- indoor control board
Order parts by your exact model number so they fit.
Other Daikin air conditioner codes
- U4Indoor and outdoor units can't communicate
- U0Low refrigerant or restricted refrigerant flow
- U2Power supply voltage problem
- UAIndoor and outdoor units don't match
- A1Indoor unit control board fault
- A3Condensate water level too high
- A5Freeze-up or overheat protection
- C4Indoor coil temperature sensor fault
- C9Indoor room air temperature sensor fault
- E1Outdoor unit control board fault
- E5Compressor overload or lock-up protection
- E6Compressor won't start
- E7Outdoor fan motor fault
- E8Compressor current too high
- F3Compressor discharge temperature too high
- F6High pressure in cooling mode
- H6Compressor position sensing error
- L4Inverter heat sink overheating
- L5Inverter output overcurrent
Frequently asked questions
What does A6 mean on a Daikin air conditioner?
The indoor fan isn't turning at the speed the control board expects, or has stopped. Causes include a failed or locked fan motor, a damaged or unplugged motor harness, or a fault on the indoor board.
Can I fix Daikin A6 myself?
Only the basic checks. You can safely try the steps above, but A6 usually points to a part or fault that needs a technician.
What if A6 keeps coming back?
A code that returns after a reset and the checks above usually means a part is wearing out. Note when A6 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.