How much does it cost to fix boiler error code 80 ❍, yellow ❍?

Typical repair cost for the boiler 80 ❍, yellow ❍ fault is £120-250 including labour.

80 ❍, yellow ❍ Medium

Boiler Fault Code 80 ❍, yellow ❍

Also written as 80YELLOW — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 80 ❍, yellow ❍ 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 stopped heating because a secondary control, typically a floor thermostat or a safety cut-out for underfloor heating, is telling the system to power down. (As reported on Ariston Clas One)

Pick your boiler brand for the 80 ❍, yellow ❍ fix

Ariston 80 ❍, yellow ❍ 1 model

Source

Information for the 80 ❍, yellow ❍ 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