BoilerFaultCodesYour boiler is struggling to detect a flame, which means it cannot fire up to provide heating or hot water.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame detection fault
What causes this fault?
This fault occurs when the boiler's control system cannot confirm that a flame has successfully ignited inside the burner. The most common reasons include a worn-out sensor that monitors the fire, a blockage in the gas supply, or an electrical issue preventing the ignition spark from triggering.
This fault can occasionally appear during the first cold snap of autumn when a boiler has been inactive all summer and the gas components have become slightly stuck or dusty.
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 0A2 — 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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