How much does it cost to fix boiler error code 5P1?

Typical repair cost for the boiler 5P1 fault is £100-250 including labour.

5P1 High

Boiler Fault Code 5P1

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 5P1 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 light properly after several attempts, usually due to an unreliable gas supply or a slightly dirty component. (As reported on Ariston Alteas One)

Pick your boiler brand for the 5P1 fix

Ariston 5P1 1 model

Source

Information for the 5P1 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