What does the Potterton neon flashing (Section B/C) fault code mean?

Your boiler is failing to circulate water correctly, which means it cannot produce hot water or heating.

How much does it cost to fix Potterton error code neon flashing (Section B/C)?

Typical repair cost for the Potterton neon flashing (Section B/C) fault is £150-300 including labour.

Pump or primary flow switch fault - Primary flow switch not operated or pump not running

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.

Safety-critical — turn off, read this.