A41 High

Boiler Fault Code A41

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code A41 appears across 3 boiler brands and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because water is not circulating through the system properly, often due to a pump issue or a closed valve. (As reported on Potterton Powermax HE)

Pick your boiler brand for the A41 fix

Ariston A41 2 models Ferroli A41 7 models Potterton A41 1 model

Source

Information for the A41 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