How much does it cost to fix boiler error code Lights: Flash, Off, Flash?

Typical repair cost for the boiler Lights: Flash, Off, Flash fault is £90-250 including labour.

Lights: Flash, Off, Flash High

Boiler Fault Code Lights: Flash, Off, Flash

Also written as LIGHTSFLASHOFFFLASH — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Lights: Flash, Off, Flash appears across 2 boiler brands 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 not receiving enough electrical power to operate properly, likely due to a fault in your home's wiring or a power supply issue. (As reported on Baxi Solo 2)

Pick your boiler brand for the Lights: Flash, Off, Flash fix

Baxi Lights: Flash, Off, Flash 2 models Potterton Lights: Flash, Off, Flash 3 models

Source

Information for the Lights: Flash, Off, Flash 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