How much does it cost to fix boiler error code Limescale Build-up?

Typical repair cost for the boiler Limescale Build-up fault is £150-300 including labour.

Limescale Build-up Medium

Boiler Fault Code Limescale Build-up

Also written as LIMESCALEBUILDUP — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Limescale Build-up appears across 1 boiler brand and 3 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 that built-up mineral deposits are preventing your water from heating efficiently, so it has capped the temperature to protect the system from further damage. (As reported on Ariston Eurocombi 20 1mfs)

Pick your boiler brand for the Limescale Build-up fix

Ariston Limescale Build-up 3 models

Source

Information for the Limescale Build-up 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 7 July 2026