How much does it cost to fix boiler error code AL 83?

Typical repair cost for the boiler AL 83 fault is £120-280 including labour.

AL 83 High

Boiler Fault Code AL 83

Also written as AL83 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code AL 83 appears across 1 boiler brand and 13 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 burn gas correctly, which is often caused by a temporary interruption in the fuel supply or an issue with the ventilation system. (As reported on Sime Halstead Trio)

Pick your boiler brand for the AL 83 fix

Sime AL 83 13 models

Source

Information for the AL 83 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