How much does it cost to fix boiler error code F 02 or FN or LN?

Typical repair cost for the boiler F 02 or FN or LN fault is £120-250 including labour.

F 02 or FN or LN High

Boiler Fault Code F 02 or FN or LN

Also written as F02ORFNORLN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code F 02 or FN or LN 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 stopped heating because the flame inside has gone out unexpectedly, preventing it from producing heat. (As reported on Ideal Logic+ Heat)

Pick your boiler brand for the F 02 or FN or LN fix

Ideal F 02 or FN or LN 1 model

Source

Information for the F 02 or FN or LN 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 7 July 2026