What does the Worcester Bosch EF 349 fault code mean?

Your boiler is struggling to move water around the system correctly, causing it to throttle its power back 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.

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

Check that all radiator valves are fully openEnsure the system pressure is between 1 and 1.5 barGently bleed your radiators to remove trapped air

Each noise points to a different fault.

Sludge build-up — needs flushing, not bleeding.

Work through these before the call-out.