How much does it cost to fix boiler error code Error 05?

Typical repair cost for the boiler Error 05 fault is £120-250 including labour.

Error 05 High

Boiler Fault Code Error 05

Also written as ERROR05 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Error 05 appears across 1 boiler brand and 8 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 accurately adjust its internal settings, which means it has paused operation to prevent any potential damage. (As reported on Atag Q 30CR)

Pick your boiler brand for the Error 05 fix

Atag Error 05 8 models

Source

Information for the Error 05 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