BoilerFaultCodesYour boiler's computer has detected a flame when it shouldn't be there, or is confused by an electrical signal from the burner area.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fault: Electronics/flame - Implausible flame signal
What causes this fault?
This fault occurs when the boiler’s control board detects an electrical signal suggesting a flame is present even though the gas should be turned off. The most common reason is a hardware failure within the main circuit board or moisture and carbon build-up on the sensing electrodes causing a 'ghost' signal. It is essentially a safety conflict where the boiler shuts down because it cannot confirm the burner is actually extinguished.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A boiler cover plan would cover faults like F.67 — 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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