How much does it cost to fix boiler error code ALL05?

Typical repair cost for the boiler ALL05 fault is £100-350 including labour.

ALL05 High

Boiler Fault Code ALL05

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code ALL05 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected a technical fault that has caused it to shut down for safety, and it requires a professional inspection to identify the internal cause. (As reported on Sime iQE Simplicity 20T)

Pick your boiler brand for the ALL05 fix

Sime ALL05 1 model

Source

Information for the ALL05 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 7 July 2026