How much does it cost to fix boiler error code oF?

Typical repair cost for the boiler oF fault is £0-280 including labour.

oF High

Boiler Fault Code oF

Also written as OF — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code oF appears across 3 boiler brands and 13 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is in a standby or programming mode and thinks it has been told to stay switched off. (As reported on Ideal Logic Combi C24 C30 C35)

Pick your boiler brand for the oF fix

Baxi oF 1 model Ideal oF 9 models Zanussi oF 3 models

Source

Information for the oF 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 31 August 2026