How much does it cost to fix boiler error code d.69?

Typical repair cost for the boiler d.69 fault is £120-250 including labour.

d.69 High

Boiler Fault Code d.69

Also written as D69 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code d.69 appears across 3 boiler brands and 39 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to light because it has failed to ignite twice in a row, meaning it has currently stopped trying to provide heat to ensure safety. (As reported on Glow-worm Ultimate 3 25R)

Pick your boiler brand for the d.69 fix

Glow-worm d.69 11 models Heatline d.69 2 models Vaillant d.69 26 models

Source

Information for the d.69 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026