Your boiler is reporting a normal status update rather than a failure, indicating that the internal burner control system is currently operating correctly.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Burner control unit state (0=burner control unit OK)
What causes this fault?
This code appears as a status communication between the boiler's internal computer and the burner system. It indicates that the self-testing sequence has been completed successfully and the burner control unit is functioning exactly as it should. Because this is a positive status update rather than a malfunction, your boiler has not actually stopped working.
DIY fix possible
Check if the display returns to the home screen manuallyPerform a simple reset if the code persists on the displayMonitor for any other numerical codes that may appear alongside it
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A boiler cover plan would cover faults like 38:0 — no call-out fees, no surprises.
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