How much does it cost to fix boiler error code GREEN LED ON every 0.5-secs?

Typical repair cost for the boiler GREEN LED ON every 0.5-secs fault is £0-120 including labour.

GREEN LED ON every 0.5-secs Medium

Boiler Fault Code GREEN LED ON every 0.5-secs

Also written as GREENLEDONEVERY05SECS — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code GREEN LED ON every 0.5-secs appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is in a temporary standby mode because it has detected a minor issue, such as low water pressure or a momentary sensor error. (As reported on Vokera Compact HE)

Pick your boiler brand for the GREEN LED ON every 0.5-secs fix

Vokera GREEN LED ON every 0.5-secs 5 models

Source

Information for the GREEN LED ON every 0.5-secs 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