How much does it cost to fix boiler error code AL 02?

Typical repair cost for the boiler AL 02 fault is £80-150 including labour.

AL 02 High

Boiler Fault Code AL 02

Also written as AL02 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code AL 02 appears across 1 boiler brand and 22 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 water pressure inside the heating system has dropped below the minimum level required to operate safely. (As reported on Sime Mia 30)

Pick your boiler brand for the AL 02 fix

Sime AL 02 22 models

Source

Information for the AL 02 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