Boiler won't light (Ideal Icos)

[betts]

I have an ideal icos condensing boiler that will not light. I cannot see a spark from the ignition electrode(which I have replaced), what else could it be?

 

[kevplumb]

pcb

 

[betts]

I was afraid it would be that! I expect thats going to cost me in the region of £250, is there any way i can test the PCB or is it 99% certain to be the PCB?

Thanks

 

[kevplumb]

condensing boilers are wonderful when they work and blo**y expensive when they dont wait awhile some of the other guys might know better
i now mostly do installs

 

[betts]

Thanks for your help kev.

Anymore help out there ?

 

[ChrisR]

fan running? pump running? how far does this beauty get if the condensate trap is blocked - can't remember. You have the manual?

 

[kevplumb]

ahh s**t missed the bl**dy obvious again cheers mate

 

[betts]

Centeral heating switched to on,pump running.
Boiler attempts to start and fails. Can hear clicking/switching and fan noises as normal but observe no spark. Gas seems to be getting into the boiler as I can smell it.

Fault code comes up as flame fault. Installation and service guide states to check ignition electrode and gas valve.

 

[ChrisR]

Well I know what I'd do next but you're into corgi territory.
Did you (naughty naughty) change the electrode lead as well as the electrode? SOmetimes they break their insulation and spark to the case or somesuch.

 

[betts]

The lead and the electrode come supplied as one piece.
Any ideas on what next ?
Used to be a plumber but still naughty I know

 

[betts]

I take it there isn't an Ideal Icos expert out there then

Can't find seem to find much out about them, are they any good ? (or am I answering my own question?)

 

[kevplumb]

installed quite a few never had any bother till today same fault i think if i can get a copy of the engineers report ill let you know what it says

 

[ChrisR]

Jeeshus H wossisname. You have gas coming out which you can smell, you don't see a spark. So it would appear pretty clear that the sparky bit is broke. Boilers on the whole don't let gas out until they intend having a go at lighting it. It would be highly irresponsible of course to put a match to the gas, even with a spanner on the gas cock so you could turn it off quick, but that would give an idea if the gas bit was working. Obviously nobody would ever dream of doing such a terrible awful heinous thing.

 

[kevplumb]

i would but wasnt going to admit it

 

[betts]

Well I replaced the sparky bit so it would seem to rule the electrode and wiring harness out.
I don't think I will attempt the match in the boiler trick though as I value the little hair I do have left

I have a hunch its the PCB but at £200+ it could prove costly if wrong.