How much does it cost to fix boiler error code Err.5?

Typical repair cost for the boiler Err.5 fault is £120-250 including labour.

Err.5 High

Boiler Fault Code Err.5

Also written as ERR5 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Err.5 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 detected a recurring internal fault that is preventing it from operating safely, requiring a professional to reset and troubleshoot the control system. (As reported on Atag E22c)

Pick your boiler brand for the Err.5 fix

Atag Err.5 2 models

Source

Information for the Err.5 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