BoilerFaultCodes L 0d High
Boiler Fault Code L 0d
Also written as L0D — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L 0d appears across 1 boiler brand 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 stopped working because it cannot safely get rid of exhaust fumes or waste water, often due to a blockage or a frozen pipe. (As reported on Ideal Logic Code Combi ESP1)
Pick your boiler brand for the L 0d fix
Source
Information for the L 0d 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 27 April 2026