How much does it cost to fix boiler error code F.002?

Typical repair cost for the boiler F.002 fault is £120-220 including labour.

F.002 High

Boiler Fault Code F.002

Also written as F002 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code F.002 appears across 1 boiler brand 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 struggling to detect the temperature of your hot water supply because of a faulty connection or sensor, which will likely prevent you from getting hot water. (As reported on Vaillant ecoTEC Plus 836)

Pick your boiler brand for the F.002 fix

Vaillant F.002 3 models

Source

Information for the F.002 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 7 July 2026