Lights Flash Off On High

Boiler Fault Code Lights Flash Off On

Also written as LIGHTSFLASHOFFON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Lights Flash Off On appears across 2 boiler brands and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has switched itself off because it has become too hot internally, usually due to a lack of water flow or a circulation error. (As reported on Baxi 130 HE (range))

Pick your boiler brand for the Lights Flash Off On fix

Baxi Lights Flash Off On 3 models Potterton Lights Flash Off On 3 models

Source

Information for the Lights Flash Off On 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