BoilerFaultCodes L46 High
Boiler Fault Code L46
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code L46 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's internal computer system has detected a communication or electrical issue with the power supply that controls the compressor. (As reported on Ideal HP290)
Pick your boiler brand for the L46 fix
Source
Information for the L46 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