How much does it cost to fix boiler error code AL 89?

Typical repair cost for the boiler AL 89 fault is £120-350 including labour.

AL 89 High

Boiler Fault Code AL 89

Also written as AL89 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code AL 89 appears across 1 boiler brand and 6 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 maintain a steady flame and has shut down as a safety precaution to ensure gas is burning correctly. (As reported on Sime Brava One HE)

Pick your boiler brand for the AL 89 fix

Sime AL 89 6 models

Source

Information for the AL 89 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 7 July 2026