Your boiler's internal communication system has identified an addressing conflict between different control units on the network.

What causes this fault?

This fault occurs when two or more components on the boiler's internal communication network are trying to use the same identification number. It is usually caused by a technician incorrectly configuring the settings during a repair or by a digital glitch that has scrambled the control unit's memory. Because the system cannot distinguish between the different parts, it struggles to send and receive commands correctly.