How much does it cost to fix boiler error code E 15?

Typical repair cost for the boiler E 15 fault is £250-450 including labour.

E 15 High

Boiler Fault Code E 15

Also written as E15 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E 15 appears across 4 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has encountered a serious error and can no longer control the system, meaning your heating and hot water will not work. (As reported on Vokera Hydra)

Pick your boiler brand for the E 15 fix

Ariston E 15 2 models Chaffoteaux E 15 1 model Ideal E 15 1 model Vokera E 15 1 model

Source

Information for the E 15 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