How much does it cost to fix boiler error code A (number)?

Typical repair cost for the boiler A (number) fault is £150-450 including labour.

A (number) High

Boiler Fault Code A (number)

Also written as ANUMBER — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code A (number) 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 detected a safety concern or internal failure and has shut itself down to prevent damage. (As reported on Potterton Powermax HE)

Pick your boiler brand for the A (number) fix

Potterton A (number) 1 model

Source

Information for the A (number) 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