How much does it cost to fix boiler error code 10.i?

Typical repair cost for the boiler 10.i fault is £120-250 including labour.

10.i Medium

Boiler Fault Code 10.i

Also written as 10I — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 10.i 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 is struggling to keep the water flowing at a steady rate, causing it to constantly turn on and off as it fails to regulate the temperature properly. (As reported on Chaffoteaux Celtic 2 24 Rsc)

Pick your boiler brand for the 10.i fix

Chaffoteaux 10.i 3 models

Source

Information for the 10.i 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