What does the Alpha 89 fault code mean?

Your boiler is struggling to keep its internal flame lit steadily, so it has safely shut itself down to prevent any issues.

How much does it cost to fix Alpha error code 89?

Typical repair cost for the Alpha 89 fault is £150-300 including labour.

Flame signal unstable - A malfunction of one of the components of the air/gas circuit - the flame is unstable

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.

Older boilers — thermocouple, draught, gas supply.

7 signs repair isn't worth it anymore.