BoilerFaultCodesTechnical description
Fault codes 1x appear when the burner has failed to ignite or the flame supervisione system has failed to detect a flame.
What causes this fault?
This fault occurs when the boiler tries to start but fails to create or maintain a steady flame. It is usually caused by a lack of gas reaching the burner, a worn-out spark plug that cannot ignite the fuel, or a dirty sensor that fails to 'see' the flame even when it is lit. In some cases, a fault with the main control board means the boiler doesn't send the signal to start the ignition process at all.
This fault is more common during the first cold snap of winter, as gas valves can occasionally stick after being inactive during the summer months.
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.