What does the Chaffoteaux 9.i fault code mean?

Your boiler is heating up too quickly because the water cannot circulate properly, likely due to a build-up of debris in its internal filter.

How much does it cost to fix Chaffoteaux error code 9.i?

Typical repair cost for the Chaffoteaux 9.i fault is £90-180 including labour.

Excessive temperature rise across boiler - Return filter blocked

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.

7 signs repair isn't worth it anymore.