How much does it cost to fix boiler error code 601?

Typical repair cost for the boiler 601 fault is £120-250 including labour.

601 Emergency

Boiler Fault Code 601

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 601 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 is struggling to confirm that the exhaust gases are venting correctly, so it has safely shut down to prevent any risk. (As reported on Ariston HS Premium)

Pick your boiler brand for the 601 fix

Ariston 601 1 model

Source

Information for the 601 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