BoilerFaultCodesTechnical description
Flame detected before burner operation – try resetting the boiler
What causes this fault?
This fault occurs when the boiler's internal sensors detect a flame prematurely, which is a significant safety risk. The most common reason is a faulty gas valve that is leaking fuel into the burner tray or an electrical glitch in the main control board that incorrectly 'sees' a flame that isn't actually there.
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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