BoilerFaultCodes LCB High
Boiler Fault Code LCB
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code LCB appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your heat pump has encountered a communication or power issue with the internal electronics that manage the motor, causing the system to stop working. (As reported on Ideal HP290)
Pick your boiler brand for the LCB fix
Source
Information for the LCB 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