keep getting the A01 fault on my Ariston combi. It does not fire up in alloted time, although the piezo's spark OK .Recommended change From Ariston was the PCB.....located and fitted a recon. and I still have my fault. had it in bits more times than i care to think!! heard it could be the gas valve...checked it and little lube...but my fault still there A01

Any ideas?????????

briash, April 2010

check ignitor probes through burner window, if ignitor continues to spark after lighting boiler then pcb needs replacing. On fitting new pcb bend heat sensing probe 2-3mm away from ignitor probes to prevent damage to pcb again.

Dave, October 2010