What does the Worcester Bosch 2964 B fault code mean?

Your boiler has sensed that water is not moving through the system fast enough, causing it to shut down to prevent overheating.

How much does it cost to fix Worcester Bosch error code 2964 B?

Typical repair cost for the Worcester Bosch 2964 B fault is £100-350 including labour.

Check that your system pressure is between 1 and 1.5 bar on the internal gauge

Flow rate in heat exchanger is too low

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.

Almost always a stuck diverter valve on combis.