BoilerFaultCodesYour boiler thinks a flame is present when there shouldn't be one, which stops it from starting up correctly for safety reasons.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: False flame.
What causes this fault?
This fault occurs when the boiler's control system detects a flame signal even though the burner hasn't been told to ignite yet. The most common reasons are a contaminated sensing electrode sending a false signal, a gas valve that is leaking slightly, or a glitch in the circuit board's electronics.
DIY fix possible
Reset the boiler by turning the selector switch to 'R' for 5 seconds and then releasing itCheck for any signs of water leaking onto the boiler or dripping from nearby pipesEnsure the boiler's electrical supply is stable and not plugged into an extension lead
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 E384 — 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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