Boiler Fault Code LA/HA

Also written as LAHA — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026

Fault code LA/HA appears across 2 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that it is running much hotter than it should be and has automatically switched itself off to prevent damage. (As reported on Ideal Mexico)