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

Your boiler has detected that water is not flowing properly around your heating system, so it has safely shut down to prevent overheating.

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

Typical repair cost for the Chaffoteaux 30-80 (M, M, M, L, M, M) fault is £150-350 including labour.

Primary water circulation defect

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.