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

Typical repair cost for the boiler Lh fault is £250-400 including labour.

Lh High

Boiler Fault Code Lh

Also written as LH — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Lh 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 boiler has detected an internal communication error with its control panel, which means it will likely stop heating or providing hot water to prevent unpredictable operation. (As reported on Baxi Combi 130 HE)

Pick your boiler brand for the Lh fix

Baxi Lh 1 model

Source

Information for the Lh 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 7 July 2026