BoilerFaultCodesDaikin 7 Fault Code
The Daikin 7 fault code means: your boiler is currently performing a routine self-maintenance task to keep your hot water ready or to prevent internal components from freezing.. It appears on 2 Daikin models in our database.
Technical description: Heating up unit / Frost protection: The tap comfort function is keeping the heat exchanger at temperature, or frost protection has intervened because the heat exchanger temperature dropped too low.
DIY fix possible
Check if the display returns to normal after 5-10 minutes.Ensure your thermostat is calling for heat if the house is cold.Verify that the boiler's condensate pipe hasn't frozen if the outside temperature is very low.
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Daikin models that show the 7 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Daikin 7 fault code information on this page is sourced and cross-checked against the official Daikin service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026