How much does it cost to fix boiler error code E040?

Typical repair cost for the boiler E040 fault is £90-180 including labour.

E040 High

Boiler Fault Code E040

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E040 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that the water pressure is either too low or the sensor that monitors it is not communicating correctly. (As reported on Vokera Evolve)

Pick your boiler brand for the E040 fix

Vokera E040 4 models

Source

Information for the E040 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