L65 High

Boiler Fault Code L65

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code L65 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 stopped working because of a communication or electrical issue within its internal power control unit. (As reported on Ideal HP290)

Pick your boiler brand for the L65 fix

Ideal L65 1 model

Source

Information for the L65 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