BoilerFaultCodesYour boiler's main internal computer has lost communication with one of its electronic parts, meaning it cannot operate until the connection is restored.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Module not detected.
What causes this fault?
This fault occurs when the boiler's central control board stops receiving signals from its internal electronic module. The most common cause is a loose connection in the wiring harness or a critical failure of the Printed Circuit Board (PCB) itself. If these sensors and modules cannot talk to each other, the boiler shuts down as a safety precaution.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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