Your boiler's internal control screen is unable to communicate properly with the main computer board, often after a recent repair or parts change.

User interface not compatible with boiler

What causes this fault?

This fault occurs when the boiler's internal display panel and the main control board are unable to understand each other's signals. It most commonly happens after a recent repair where a new part has been installed that isn't programmed correctly or is mismatched for your specific model. Essentially, the boiler’s 'brain' and 'face' are no longer speaking the same language.