Boiler Fault Code Err.L

Also written as ERRL — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code Err.L appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has recorded a previous fault in its memory, but this status message simply identifies that an error happened in the past rather than indicating a current, active failure. (As reported on Atag E22c)