How much does it cost to fix boiler error code F00?

Typical repair cost for the boiler F00 fault is £90-160 including labour.

F00 High

Boiler Fault Code F00

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code F00 appears across 2 boiler brands and 17 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 it cannot correctly measure the temperature of the water leaving the unit. (As reported on Glow-worm Ultracom 24cx 30cx)

Pick your boiler brand for the F00 fix

Glow-worm F00 9 models Heatline F00 8 models

Source

Information for the F00 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