What does the Worcester Bosch 204 fault code mean?

Your boiler has detected that the water inside the unit is getting too hot, so it has safely shut itself down to prevent damage.

How much does it cost to fix Worcester Bosch error code 204?

Typical repair cost for the Worcester Bosch 204 fault is £120-250 including labour.

Current prim. water temp. higher than set val. The actual boiler water temperature is higher than the target boiler water temperature.

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.