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

Typical repair cost for the boiler neon flashing (Section B/C) fault is £150-250 including labour.

neon flashing (Section B/C) High

Boiler Fault Code neon flashing (Section B/C)

Also written as NEONFLASHINGSECTIONBC — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code neon flashing (Section B/C) appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to push water around your heating system because the water pump is either stuck or blocked by trapped air. (As reported on Potterton Performa 30 HE)

Pick your boiler brand for the neon flashing (Section B/C) fix

Potterton neon flashing (Section B/C) 2 models

Source

Information for the neon flashing (Section B/C) fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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