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

Typical repair cost for the boiler Red LED On fault is £120-250 including labour.

Red LED On High

Boiler Fault Code Red LED On

Also written as REDLEDON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red LED On appears across 2 boiler brands 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 general internal error and has safely shut itself down to prevent damage, meaning you currently have no heating or hot water. (As reported on Vokera Option)

Pick your boiler brand for the Red LED On fix

Halstead Red LED On 1 model Vokera Red LED On 1 model

Source

Information for the Red LED On 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