Hi guys 1st time posting. Tried to post on combustion chamber forum after entering my details but failed lol. Anyway, f62 fault code. Pcb fault or the ribbon between it & display pcb or passing gas valve ? Fault appeared yesterday for 1st time & when reset it fired 1st time & no issues since. Boiler is approx 3 yr old has been serviced annually & wouldn't be abused in hours used either. Any advice welcome if youve encountered this fault before. Many thanks in advance guys