How much does it cost to fix boiler error code LD1?

Typical repair cost for the boiler LD1 fault is £100-300 including labour.

LD1 High

Boiler Fault Code LD1

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code LD1 appears across 2 boiler brands and 6 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 a lockout fault and has shut down to protect itself, meaning your heating and hot water will not work until it is reset. (As reported on Vokera Option)

Pick your boiler brand for the LD1 fix

Biasi LD1 2 models Vokera LD1 4 models

Source

Information for the LD1 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