BoilerFaultCodesTechnical description
System fault boiler electronics / basic controller
What causes this fault?
This fault occurs when the boiler's main control board experiences a breakdown in communication with other internal electronic components. It is typically caused by a physical failure within the Printed Circuit Board's circuitry or a loose connection in the wiring harness that links the sensors to the main computer. Essentially, the boiler has lost its ability to send and receive the vital data signals needed to operate safely.
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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