Observation:

Select from the list below the fault code that corresponds with that displayed by the boiler.
L1 - OverheatL2 - Boiler has attempted to light 5 times and failed
L3 - No Water FlowL5 - 5 Resets in 15 Mins - Switch mains power off then back on
L6 - False Flame LockoutF1 - Low Water Pressure
F2 - Flame LostF3 - Fan Fault
F4 - Flow Temperature Sensor FaultF5 - Return Temperature Sensor Fault
F7 - Low Mains Voltage - Contact Electricity Provider F9 - PCB Fault
F0 - No Flow Temperature Sensor Faultc2 - BCC (Boiler Chip Card) Fault
FA - Return Pipe Hotter Than Flow