What does the Alpha 03 fault code mean?

Your boiler has detected that the exhaust gases are getting too hot and has shut down as a safety precaution to prevent internal damage.

How much does it cost to fix Alpha error code 03?

Typical repair cost for the Alpha 03 fault is £120-300 including labour.

Flue sensor intervention (flue temperature too high)

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.