BoilerFaultCodesTechnical 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 is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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