What does the Worcester Bosch 2964 fault code mean?

Your boiler has detected that water is not flowing through it fast enough to keep it cool, so it has stopped working as a safety precaution.

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

Typical repair cost for the Worcester Bosch 2964 fault is £150-350 including labour.

Signal from flow and heat exchanger temperature sensor outside the permissible range

This is a high 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.

Sludge build-up — needs flushing, not bleeding.