Daikin Boiler Fault Codes

46 fault codes across 1 Daikin boiler models — explained in plain English.

Japanese HVAC giant. Increasingly popular for heat pumps and hybrid systems in the UK.

46 fault codes
1 models documented
1 currently sold
0 legacy models
Just want the most common Daikin problems?
The top 8 faults across the whole Daikin range — causes, DIY checks, repair costs.
Most serious

High-severity Daikin fault codes

10-64
Your boiler has detected a communication issue with its internal gas control system and has shut down as a safety precaution.
D2CND
 10-65
Your boiler has detected an electrical issue with the gas control system and has shut down as a safety precaution.
D2CND
 11-64
Your boiler is having trouble lighting the gas to start the heating process and may need to be restarted.
D2CND
 11-65
Your boiler is struggling to keep the flame steady and will keep trying to restart itself until it succeeds.
D2CND
 11-66
Your boiler is struggling to light or recognize that a flame has started, causing it to shut down for safety after several failed attempts.
D2CND
All models

1 Daikin boiler models

D2CND
Combi
46 fault codes · 2017-present