BoilerFaultCodesYour boiler's internal computer has encountered a critical error and can no longer control the heating and hot water functions safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: There is an internal fault in the Automatic Control Module.
What causes this fault?
This fault occurs when the boiler's main control board experiences a hardware failure or a memory error, meaning it can no longer process data correctly. The most common reason is natural wear and tear of the electronic components, though electrical surges or moisture getting onto the board can also trigger this complete failure.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
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A boiler cover plan would cover faults like 06 — no call-out fees, no surprises.
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