How much does it cost to fix boiler error code Override Green (flashing)?

Typical repair cost for the boiler Override Green (flashing) fault is £0-120 including labour.

Override Green (flashing) Medium

Boiler Fault Code Override Green (flashing)

Also written as OVERRIDEGREENFLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Override Green (flashing) 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 smart thermostat has lost connection with the boiler, causing it to enter a backup safety mode to ensure you aren't left without heat. (As reported on Ideal Halo Air RF WI FI 2 Zone)

Pick your boiler brand for the Override Green (flashing) fix

Ideal Override Green (flashing) 1 model

Source

Information for the Override Green (flashing) 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