BoilerFaultCodesTechnical description
Safety switch off flame simulation
What causes this fault?
This fault occurs when the boiler's internal sensors continue to detect a flame even after the gas has been turned off and the burners should be extinguished. The most common reason is a malfunctioning flame sensor or a faulty gas valve that is leaking fuel into the combustion chamber, causing the boiler to shut down for your safety.
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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