What does the Atag Error 80 fault code mean?

Your boiler has detected that the exhaust gases are becoming dangerously hot and has shut down to prevent damage or overheating.

How much does it cost to fix Atag error code Error 80?

Typical repair cost for the Atag Error 80 fault is £150-300 including labour.

maximum flue gas sensor temperature exceeded

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.

Lockout fault with a reset-needed pattern.

Sludge build-up — needs flushing, not bleeding.