BoilerFaultCodesTechnical description
Interface board compatibility fault
What causes this fault?
This fault occurs when the boiler's internal computer chips cannot speak the same language, usually after a repair where a new part has been installed. The most common reason is that the main control board and the display screen board are mismatched versions or have not been digitally 'paired' correctly. In some cases, a sudden power surge can scramble these settings, causing the components to stop recognizing each other.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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