What does the Worcester Bosch E9 / 276 fault code mean?

Your boiler has detected that the water inside has become dangerously hot and has shut itself down to prevent damage.

How much does it cost to fix Worcester Bosch error code E9 / 276?

Typical repair cost for the Worcester Bosch E9 / 276 fault is £150-300 including labour.

Primary Flow temperature exceeded 95°C

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

Each noise points to a different fault.

Almost always a stuck diverter valve on combis.

Sludge build-up — needs flushing, not bleeding.