What does the Alpha B Flashing fault code mean?

Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.

How much does it cost to fix Alpha error code B Flashing?

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

Overheat thermostat has operated.

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.

Work through these before the call-out.