How much does it cost to fix boiler error code F-15?

Typical repair cost for the boiler F-15 fault is £0-120 including labour.

F-15 Medium

Boiler Fault Code F-15

Also written as F15 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code F-15 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 been manually reset too many times in a short window, causing the system to lock itself out for safety. (As reported on Johnson Starley J32 System ET)

Pick your boiler brand for the F-15 fix

Johnson Starley F-15 1 model

Source

Information for the F-15 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