How much does it cost to fix boiler error code F19?

Typical repair cost for the boiler F19 fault is £90-160 including labour.

F19 High

Boiler Fault Code F19

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code F19 appears across 3 boiler brands and 11 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has lost connection with a temperature sensor, meaning it cannot safely monitor the heat of the water going to your radiators. (As reported on Vaillant ecoMAX Pro 28E)

Pick your boiler brand for the F19 fix

Glow-worm F19 3 models Saunier Duval F19 6 models Vaillant F19 2 models

Source

Information for the F19 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