How much does it cost to fix boiler error code 04/05/06?

Typical repair cost for the boiler 04/05/06 fault is £120-220 including labour.

04/05/06 High

Boiler Fault Code 04/05/06

Also written as 040506 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 04/05/06 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 stopped working because it is having trouble reading the temperature of the water being sent to your radiators. (As reported on Chaffoteaux Serelia 24 MFFI)

Pick your boiler brand for the 04/05/06 fix

Chaffoteaux 04/05/06 2 models

Source

Information for the 04/05/06 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