What does the Alpha 27 fault code mean?

Your boiler is struggling to move water through the system, which is causing it to overheat and shut down for safety.

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

Typical repair cost for the Alpha 27 fault is £120-£350 including labour.

Check that all your radiator valves (TRVs) are turned to the highest setting

Insufficient circulation in primary circuit

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.

Lockout fault with a reset-needed pattern.