What does the Worcester Bosch Group 2, 9 flashes fault code mean?

Your boiler has detected that the water returning to it is too hot, causing it to shut down to prevent damage to its internal parts.

How much does it cost to fix Worcester Bosch error code Group 2, 9 flashes?

Typical repair cost for the Worcester Bosch Group 2, 9 flashes fault is £150-300 including labour.

Return temperature too high. Boiler overheat.

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.

Sludge build-up — needs flushing, not bleeding.

7 signs repair isn't worth it anymore.