What does the Alpha 27 fault code mean?

Your boiler is struggling to pump water around your heating system effectively, causing it to overheat and shut down to protect itself.

How much does it cost to fix Alpha error code 27?

Typical repair cost for the Alpha 27 fault is £150-300 including labour.

Insufficient circulation in primary circuit causing overheating

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.