What does the Worcester Bosch Group 2, 10 flashes fault code mean?

Your boiler has switched itself off because moving water inside the unit has become dangerously hot.

How much does it cost to fix Worcester Bosch error code Group 2, 10 flashes?

Typical repair cost for the Worcester Bosch Group 2, 10 flashes fault is £150-300 including labour.

Flow temperature too high - Supply sensor exceeded 110°C. Primary flow sensor overheated.

This is a emergency 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.

Each noise points to a different fault.

Safety-critical — turn off, read this.