What does the Alpha 02 fault code mean?

Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent any damage or danger.

How much does it cost to fix Alpha error code 02?

Typical repair cost for the Alpha 02 fault is £120-250 including labour.

Overheat boiler lock out - Overheat sensor has activated

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.

Almost always a stuck diverter valve on combis.

Sludge build-up — needs flushing, not bleeding.