this a01 fault code comes on on my boiler, i've read the other topics about it possibly being the pcb board. now my burner does not ignite at all, can just see the spark clicking in the glass window on the burner. could this possibly mean that the actual gas valve inside the boiler is faulty? or is itt still the pcb board? any help with this would be great. many thanks

martyn, September 2008

i have checked it an theres gas going in but no gas coming out, but u i assumed that was because the pcb isnt opening the gas valve ?

martyn, September 2008

id be checking gas valve as my first thought since you have attempted ignition

iain, September 2008