What does the Worcester Bosch E9 fault code mean?

Your boiler has overheated because the water inside is getting too hot or is not flowing correctly, causing the system to shut down for safety.

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

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

Check if your system pressure gauge is below 1 bar and top it up if necessary

Safety temperature limiter in central heating (CH) flow has tripped the system pressure or safety temperature limiter needs checking

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.

Work through these before the call-out.