What does the Alpha 27 fault code mean?

Your boiler is struggling to pump water around your heating system, causing the water inside to heat up too quickly and triggering a safety shutdown.

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

Typical repair cost for the Alpha 27 fault is £120-250 including labour.

Check that all your radiator valves are fully open.

Insufficient primary flow - Rapid temperature rise of primary sensor

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.

7 signs repair isn't worth it anymore.