Choose your Daikin appliance
About Daikin
Daikin Industries, based in Osaka, Japan, is one of the world's largest air conditioner manufacturers. Daikin codes are usually a letter followed by a number, such as U4 or A5, read from the remote or the indoor unit display.
Daikin air conditioner error 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
- A6Indoor fan motor fault
All 20 Daikin air conditioner codes
Before you start
- Find your model number. It's on the rating label, usually inside the door or lid, on the frame, or on the back or side panel.
- Try a reset. Unplug the appliance or switch off its breaker for 10 minutes. Many codes are one-off glitches.
- Stay safe. Never bypass safety switches or work on live wiring, gas or refrigerant lines. Each guide tells you when to call a technician.