BoilerFaultCodesTechnical description
Flame Signal loss in safety time – try to reset the boiler after 3rd unsuccessful ignition
What causes this fault?
This fault occurs when the boiler's internal sensors fail to detect a stable flame during the startup process. The most common reasons are a worn-out ignition electrode that cannot create a spark or a buildup of carbon on the probe that monitors the flame. In some cases, a blockage in the drainage pipe or a faulty gas valve prevents the burner from staying lit safely.
This fault is more common during the first cold snap of autumn when a boiler that has been idle all summer is suddenly forced to work at high intensity.
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.