How much does it cost to fix boiler error code F02?

Typical repair cost for the boiler F02 fault is £100-£180 including labour.

F02 Medium

Boiler Fault Code F02

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code F02 appears across 3 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble reading the temperature of your hot water, which usually stops the hot water from working properly. (As reported on Glow-worm Ultracom 35 Store)

Pick your boiler brand for the F02 fix

Glow-worm F02 1 model Heatline F02 1 model Viessmann F02 1 model

Source

Information for the F02 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