Your boiler’s internal computer has encountered a memory error or is having trouble communicating with its own control board.

System fault boiler electronics / basic controller

What causes this fault?

This fault occurs when the boiler's central brain suffers a software glitch or a hardware failure, preventing it from reading its own internal configuration. It is most commonly caused by an electrical data error between the main control board and the unique identification plug that tells the boiler exactly which model it is.