Your boiler has developed a serious internal electronic failure that means it can no longer recognize its own control system.

Boiler identification module or boiler electronics faulty

What causes this fault?

This fault occurs when the boiler's central brain loses communication with a specialized memory chip that tells the unit exactly which model and power setting it should be using. The most common reason is a physical connection failure between these internal components or a memory error caused by a power surge or aging electronics.