What does the Worcester Bosch 345 EF fault code mean?

Your boiler has detected that no heat is being transferred into your radiators or hot water pipes even though the system is trying to fire up.

How much does it cost to fix Worcester Bosch error code 345 EF?

Typical repair cost for the Worcester Bosch 345 EF fault is £180-350 including labour.

Supply and/or return temperatures do not change after burner start

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Almost always a stuck diverter valve on combis.

Sludge build-up — needs flushing, not bleeding.

Each noise points to a different fault.