How much does it cost to fix boiler error code 501?

Typical repair cost for the boiler 501 fault is £90-250 including labour.

501 High

Boiler Fault Code 501

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 501 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 failed to light the flame, which means you will not have any heating or hot water until the issue is resolved. (As reported on Ariston Alteas One)

Pick your boiler brand for the 501 fix

Ariston 501 1 model

Source

Information for the 501 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