How much does it cost to fix boiler error code AL34?

Typical repair cost for the boiler AL34 fault is £180-350 including labour.

AL34 High

Boiler Fault Code AL34

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code AL34 appears across 1 boiler brand and 8 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 the fan that clears away waste gases is not spinning at the correct speed or its signal isn't being picked up by the system. (As reported on Vokera Unica HE)

Pick your boiler brand for the AL34 fix

Vokera AL34 8 models

Source

Information for the AL34 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