How much does it cost to fix boiler error code Green LED on every 0.5 seconds?

Typical repair cost for the boiler Green LED on every 0.5 seconds fault is £100-220 including labour.

Green LED on every 0.5 seconds High

Boiler Fault Code Green LED on every 0.5 seconds

Also written as GREENLEDONEVERY05SECONDS — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Green LED on every 0.5 seconds 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 has paused because the water pressure is likely too low or it is struggling to clear air from the system. (As reported on Vokera Sabre 35HE)

Pick your boiler brand for the Green LED on every 0.5 seconds fix

Vokera Green LED on every 0.5 seconds 2 models

Source

Information for the Green LED on every 0.5 seconds 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