How much does it cost to fix boiler error code Red neon lit?

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

Red neon lit High

Boiler Fault Code Red neon lit

Also written as REDNEONLIT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red neon lit 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 automatically turned off because it detected that the internal water temperature became dangerously high. (As reported on Grant Vortex Combi 70)

Pick your boiler brand for the Red neon lit fix

Grant Red neon lit 1 model

Source

Information for the Red neon lit 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