How much does it cost to fix boiler error code Phase reversed neon?

Typical repair cost for the boiler Phase reversed neon fault is £80-140 including labour.

Phase reversed neon High

Boiler Fault Code Phase reversed neon

Also written as PHASEREVERSEDNEON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Phase reversed neon appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that the electrical wiring coming from your home's power supply is connected back-to-front, which is preventing the system from starting up safely. (As reported on Warmworld FFC 30/60)

Pick your boiler brand for the Phase reversed neon fix

Warmworld Phase reversed neon 1 model

Source

Information for the Phase reversed neon 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 7 July 2026