What does the Potterton E128 fault code mean?

Your boiler has detected that the flame inside has gone out while it was trying to heat your water, so it has shut down as a safety precaution.

How much does it cost to fix Potterton error code E128?

Typical repair cost for the Potterton E128 fault is £150-300 including labour.

Loss of flame during operation (the ionization current has fallen below the limit)

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.

7 signs repair isn't worth it anymore.