How much does it cost to fix boiler error code S.06?

Typical repair cost for the boiler S.06 fault is £150-£450 including labour.

S.06 High

Boiler Fault Code S.06

Also written as S06 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code S.06 appears across 4 boiler brands and 50 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is staying in a cooling-down phase for too long because it thinks the fan is still spinning after it should have stopped. (As reported on Vaillant ecoTEC Pro / ecoTEC Plus)

Pick your boiler brand for the S.06 fix

Ariston S.06 5 models Glow-worm S.06 12 models Heatline S.06 8 models Vaillant S.06 25 models

Source

Information for the S.06 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 27 April 2026