All Lamps OFF High

Biasi All Lamps OFF Fault Code

Also written as ALLLAMPSOFF — same fault.

The Biasi All Lamps OFF fault code means: your boiler appears to have no electrical power at all, meaning the screen and lights are completely blank.. It appears on 1 Biasi model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Lack of power supply or faulty electronic control p.c.b.
Typical repair cost £120-350 (including labour)

DIY fix possible

Check if the boiler's power switch is turned onCheck your home's main fuse box (consumer unit) for a tripped circuit breakerCheck the fuse in the spurred power socket next to the boiler

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Biasi models that show the All Lamps OFF fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Biasi All Lamps OFF fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026