How much does it cost to fix boiler error code F50?

Typical repair cost for the boiler F50 fault is £150-250 including labour.

F50 High

Boiler Fault Code F50

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code F50 appears across 3 boiler brands and 12 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 accurately measure the water temperature across its linked system, which is causing it to suspend its heating operations for safety. (As reported on Ferroli Force W)

Pick your boiler brand for the F50 fix

ECA F50 4 models Ferroli F50 7 models Viessmann F50 1 model

Source

Information for the F50 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