How much does it cost to fix boiler error code Yellow | On permanently?

Typical repair cost for the boiler Yellow | On permanently fault is £90-250 including labour.

Yellow | On permanently High

Boiler Fault Code Yellow | On permanently

Also written as YELLOWONPERMANENTLY — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Yellow | On permanently 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 detected a problem with the hot water system, meaning you likely have no hot water even if your heating still works. (As reported on Vokera Compact HE)

Pick your boiler brand for the Yellow | On permanently fix

Vokera Yellow | On permanently 1 model

Source

Information for the Yellow | On permanently 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