What does the Worcester Bosch EF 349 fault code mean?

Your boiler is struggling to move water through the system efficiently, causing it to slow down to prevent overheating.

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

Typical repair cost for the Worcester Bosch EF 349 fault is £120-350 including labour.

Manufacturer manual

Central heating boil detected – boiler operating at minimum burner load with temperature difference greater than 18°C between Flow & Return.

Shared across the range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

Check that all radiator valves are fully openEnsure the system pressure is between 1 and 1.5 barBleed any air from your radiators

Boiler cover options

A cover plan would handle faults like EF 349: no call-out fees, no surprise bills.

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