How much does it cost to fix boiler error code EF 349?

Typical repair cost for the boiler EF 349 fault is £150-300 including labour.

EF 349 High

Boiler Fault Code EF 349

Also written as EF349 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code EF 349 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 it cannot move water through your radiators or pipes fast enough, causing the internal temperature to rise dangerously high. (As reported on Worcester Bosch Greenstar 12i System)

Pick your boiler brand for the EF 349 fix

Worcester Bosch EF 349 4 models

Source

Information for the EF 349 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