How much does it cost to fix boiler error code F01?

Typical repair cost for the boiler F01 fault is £90-160 including labour.

F01 High

Boiler Fault Code F01

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code F01 appears across 5 boiler brands and 31 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 a sensor that measures the temperature of the water returning to the unit has developed a fault or disconnected. (As reported on Glow-worm Flexicom 18sx)

Pick your boiler brand for the F01 fix

Ferroli F01 6 models Glow-worm F01 10 models Heatline F01 9 models Ideal F01 3 models Intergas F01 3 models

Source

Information for the F01 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