Ideal Logic fault codes

13 codes from the Ideal manual for the Logic gas boiler. Pick one for what it means, the likely causes and where to start.

Code	What it means
C2	BCC fault (boiler chip card)
F2	Flame loss
F3	Fan fault
F4	Flow thermistor fault
F5	Return thermistor fault
F6	Outside sensor fault
FA	Flow/return reversed
FD	No water flow
L-C	Ignition failure lockout
L1	Flow temperature overheat lockout
L2	Ignition lockout
L-5	Repeated lockout within 15 minutes
L6	False flame lockout