BoilerFaultCodesTechnical description
Safetyswitch-off:Flamesimulation | Moistureontheelectronics,electronics(flamemonitor)defective,gas solenoidvalveleaking
What causes this fault?
This fault occurs when the boiler's internal sensors detect a flame after the gas valve has supposedly closed or before the ignition sequence has even started. The most common reason is a sensor that has become covered in carbon deposits and is sending a false reading, or a gas valve that is failing to shut off the fuel supply completely.
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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