How much does it cost to fix boiler error code F03?

Typical repair cost for the boiler F03 fault is £220-380 including labour.

F03 High

Boiler Fault Code F03

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code F03 appears across 4 boiler brands and 11 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 working because the fan that removes waste gases is not spinning correctly, causing the system to shut down for safety. (As reported on Ideal Logic Code Combi ESP1)

Pick your boiler brand for the F03 fix

Ferroli F03 3 models Heatline F03 2 models Ideal F03 3 models Intergas F03 3 models

Source

Information for the F03 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