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

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

Red High

Boiler Fault Code Red

Also written as RED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Red appears across 3 boiler brands and 7 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 fault and stopped working for safety reasons, meaning you currently have no heating or hot water. (As reported on Chaffoteaux Sterling FF)

Pick your boiler brand for the Red fix

Ariston Red 1 model Chaffoteaux Red 1 model Grant Red 5 models

Source

Information for the Red 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