How much does it cost to fix boiler error code Green LED On every 0.5 second?

Typical repair cost for the boiler Green LED On every 0.5 second fault is £0-120 including labour.

Green LED On every 0.5 second Low

Boiler Fault Code Green LED On every 0.5 second

Also written as GREENLEDONEVERY05SECOND — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Green LED On every 0.5 second 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 paused temporarily and is waiting for conditions to return to normal before it attempts to start again. (As reported on Halstead iHeat 24c)

Pick your boiler brand for the Green LED On every 0.5 second fix

Halstead Green LED On every 0.5 second 1 model

Source

Information for the Green LED On every 0.5 second 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