BoilerFaultCodesDaikin 13-64 / 13-65 Fault Code
Also written as 13641365 — same fault.
The Daikin 13-64 / 13-65 fault code means: your boiler's fan is not spinning at the correct speed to safely clear waste gases, causing the system to shut down for safety.. It appears on 1 Daikin model in our database.
Technical description: Fan speed error – try resetting the boiler
What causes the Daikin 13-64 / 13-65 fault?
This fault occurs when the boiler's internal computer detects that the fan is spinning too slowly or not at all, meaning it cannot safely expel exhaust fumes or pull in fresh air. The most common reasons include a mechanical failure within the fan motor itself, a loose connection in the wiring, or a fault on the main control board that prevents it from sending the correct signals to the fan.
DIY fix possible
Press the Reset button on the boiler control panel once.Wait for the boiler to complete its startup sequence.Ensure there are no external blockages to the flue pipe outside your home.
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Gas Safe Register →Daikin models that show the 13-64 / 13-65 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Daikin 13-64 / 13-65 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 27 April 2026