How much does it cost to fix boiler error code Lockout LED?

Typical repair cost for the boiler Lockout LED fault is £120-300 including labour.

Lockout LED High

Boiler Fault Code Lockout LED

Also written as LOCKOUTLED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Lockout LED appears across 1 boiler brand and 2 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 safety issue and stopped working to protect itself, meaning you currently have no heating or hot water active. (As reported on Potterton Promax)

Pick your boiler brand for the Lockout LED fix

Potterton Lockout LED 2 models

Source

Information for the Lockout LED 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