How much does it cost to fix boiler error code 2 yellow?

Typical repair cost for the boiler 2 yellow fault is £90-160 including labour.

2 yellow Medium

Boiler Fault Code 2 yellow

Also written as 2YELLOW — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 2 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 thinks you are running a hot tap even when they are all turned off, which may cause the heating to stay off or the internal water to overheat. (As reported on Ferroli Combi 77 FF Popular)

Pick your boiler brand for the 2 yellow fix

Ferroli 2 yellow 1 model

Source

Information for the 2 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