What does the Worcester Bosch E9 285 fault code mean?

Your boiler has sensed that the water returning to the unit is much too hot, causing it to shut down to prevent damage to the internal components.

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

Typical repair cost for the Worcester Bosch E9 285 fault is £120-280 including labour.

Ensure all radiator valves are fully open to allow water to flow.

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.

Sludge build-up — needs flushing, not bleeding.

Safety-critical — turn off, read this.