What does the Chaffoteaux 30-80 (M, L, L, M, M, M) fault code mean?

Your boiler has detected that the water inside the system is not circulating properly, causing it to overheat and shut itself down for safety.

How much does it cost to fix Chaffoteaux error code 30-80 (M, L, L, M, M, M)?

Typical repair cost for the Chaffoteaux 30-80 (M, L, L, M, M, M) fault is £150-300 including labour.

Besides freezing burnerr

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Almost always a stuck diverter valve on combis.

Each noise points to a different fault.

Lockout fault with a reset-needed pattern.