How much does it cost to fix boiler error code None?

Typical repair cost for the boiler None fault is £150-£550 including labour.

None Medium

Boiler Fault Code None

Also written as NONE — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code None appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is likely suffering from a build-up of limescale or sludge inside the heat exchanger, causing it to vibrate or 'kettle' like a noisy tea kettle. (As reported on Worcester Bosch Greenstar 25HE)

Pick your boiler brand for the None fix

Ideal None 1 model Worcester Bosch None 1 model

Source

Information for the None 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