How much does it cost to fix boiler error code Neon4?

Typical repair cost for the boiler Neon4 fault is £90-280 including labour.

Neon4 High

Boiler Fault Code Neon4

Also written as NEON4 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Neon4 appears across 2 boiler brands and 13 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because it cannot light the flame or the internal drainage pipe is backed up with water. (As reported on Potterton Performa System HE)

Pick your boiler brand for the Neon4 fix

Glow-worm Neon4 12 models Potterton Neon4 1 model

Source

Information for the Neon4 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