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

Typical repair cost for the boiler EF 349 fault is £120-280 including labour.

EF 349 Medium

Boiler Fault Code EF 349

Also written as EF349 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code EF 349 appears across 1 boiler brand 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 is working harder than it should because water isn't circulating properly through the system, causing the pipes leading out of the boiler to be much hotter than those coming back. (As reported on Worcester Bosch Heatslave)

Pick your boiler brand for the EF 349 fix

Worcester Bosch EF 349 11 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 27 April 2026