E1-68 High

Daikin E1-68 Fault Code

Also written as E168 — same fault.

The Daikin E1-68 fault code means: your boiler has lost track of the basic flame sensor settings required to run safely and needs to be restarted to recalibrate itself.. It appears on 1 Daikin model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Ion base value is outside the factory limits or saved incorrectly – try resetting the boiler

What causes the Daikin E1-68 fault?

This fault occurs when the boiler's internal computer loses the reference point for the flame signal, meaning it can no longer accurately monitor if the gas is burning safely. The most common reason is a build-up of carbon or wear on the sensor probe, but it can also be caused by a software glitch or an inconsistent signal from the main control board.

Typical repair cost £120-350 (including labour)

DIY fix possible

Locate the power or reset button on the front control panelPress and hold the reset button for 5 secondsWait for the boiler to complete its restart sequence to see if the error clears

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Daikin models that show the E1-68 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Daikin E1-68 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