How much does it cost to fix boiler error code LC3?

Typical repair cost for the boiler LC3 fault is £450-950 including labour.

LC3 High

Boiler Fault Code LC3

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LC3 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 an internal electrical communication issue within its power control system. (As reported on Ideal HP290)

Pick your boiler brand for the LC3 fix

Ideal LC3 1 model

Source

Information for the LC3 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