BoilerFaultCodesDaikin 12-68 Fault Code
Also written as 1268 — same fault.
The Daikin 12-68 fault code means: your boiler has failed to correctly detect its own flame during start-up, likely due to a minor sensor reading inconsistency.. It appears on 1 Daikin model in our database.
Technical description: Ion base value differs from the previous value – try resetting the boiler
What causes the Daikin 12-68 fault?
This fault occurs when the boiler's internal sensor detects a change in the electrical signal produced by the flame compared to its last successful start-up. The most common reason is a buildup of carbon or moisture on the sensing probe, which prevents it from reading the flame correctly. It can also be caused by a slight degradation in the ignition cable or a worn burner seal allowing air to interfere with the reading.
DIY fix possible
Locate the Power/Reset button on the front control panelPress and hold the Reset button for 2-3 secondsWait up to 5 minutes for the boiler to complete its restart sequence
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Gas Safe Register →Daikin models that show the 12-68 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Daikin 12-68 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