How much does it cost to fix boiler error code 40 60 70?

Typical repair cost for the boiler 40 60 70 fault is £150-300 including labour.

40 60 70 High

Boiler Fault Code 40 60 70

Also written as 406070 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 40 60 70 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has failed to start its internal fan, which prevents it from safely igniting and providing heating or hot water. (As reported on Chaffoteaux Serelia 24 MFFI)

Pick your boiler brand for the 40 60 70 fix

Chaffoteaux 40 60 70 2 models

Source

Information for the 40 60 70 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