What does the Worcester Bosch E9 285 fault code mean?

Your boiler has shut down because the water coming back into the unit is far too hot, suggesting it is overheating.

How much does it cost to fix Worcester Bosch error code E9 285?

Typical repair cost for the Worcester Bosch E9 285 fault is £120-350 including labour.

Check that your main heating pump is running and hasn't seized

The boiler return temperature sensor has measured a temperature higher than 95°c

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.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.