What does the Worcester Bosch 2966 fault code mean?

Your boiler has detected that the water inside it is heating up much faster than it safely should, causing the system to shut down to prevent damage.

How much does it cost to fix Worcester Bosch error code 2966?

Typical repair cost for the Worcester Bosch 2966 fault is £150-350 including labour.

Flow temperature rise in heat exchanger too rapid

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.