Your boiler is having trouble detecting the flame needed to heat your water, causing the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame circuit fault
What causes this fault?
This fault happens when the boiler's internal computer is unable to confirm that a flame has successfully lit inside the burner. The most common reasons are a worn-out sensor that can no longer 'see' the flame or a failure in the electrical circuit that sends this signal to the main control board.
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.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 0A8 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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