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 £150-250 including labour.

neon flashing (Section B/C) High

Potterton neon flashing (Section B/C) Fault Code

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

Your boiler is struggling to push water around your heating system because the water pump is either stuck or blocked by trapped air.

Also written as NEONFLASHINGSECTIONBC — same fault.

The Potterton neon flashing (Section B/C) fault code means: your boiler is struggling to push water around your heating system because the water pump is either stuck or blocked by trapped air.. It appears on 2 Potterton models in our database.

Technical description: Pump or Primary flow switch failure / Pump jammed or air in system

Typical repair cost £150-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Potterton models that show the neon flashing (Section B/C) fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Potterton neon flashing (Section B/C) fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026