Boiler not striking up (again)!

Oh yeah, and the fan in the flue isn't coming on either.

Usually, the fan starts up, then you get sparking, then the gas valve opens.

None of the above is happening (though it does sometimes start up on its own after a while)/

Fan problem you think?

Anyway to check for this?

In message , "Simon (Dark Angel)" writes

Until the fan operates the air pressure switch, you won't get a spark or gas valve opening

look in your manual to see what the lights mean (p22 IIRC)

Do you have switched live to the pcb (WRT neutral, of course)

Is the stat presenting a short circuit?

Is the temp sensor OK?

DO you have 230 volts to the fan?

Fan problem. Or possibly fan control... It won't turn on the pilot until it has air pressure.

Have a chat with CET Ltd for spares. He may appear later - think yourself lucky the weather is warm so you won't freeze.

Andy

Have you got an installation manual for your boiler. If so, there's a fault-finding chart at page 30 something. Sounds like your fan isn't working. If the pressure switch doesn't detect any pressure from the fan, it doesn't even try to light the gas.

If you haven't got a manual, go to

"Blocking - Mains Frequency incorrect or Air Switch"

So, something to do with the air switch then?

I assume first thing to do is check to see if the fan has got power to it then, yes?

It's kinda late in the evening now, so will have to tackle this again tomorrow evening when i get back from work.

Later ?

I've already given him a checklist to work on

Fault finding chart?

That's for amateurs

vee don't neeed no steenkin' fault finding chart

Most of us have never seen one and have to work from first principles!

You might not! But the OP *is* an amateur, and almost certainly doesn't have your detailed knowledge of the start-up sequence. There's nothing wrong with that!

He doesn't need it

I'm here as always

Give a man a fish, and all that . . .

Right, I think I might have made a discovery here.

When I lowered the PCB housing to take a look at the wiring, the boiler suddenly clicked on and fired up OK.

When I went to screw it back on to the boiler, it stopped again.

So I started looking at all the plugs on the PCB, when I wiggled the yellow wires, which I believe go to the temperature sensor, it suddenly sprang to life.

So I'm thinking loose connection on the temp sensor at the PCB end?

Crossed posts :) Think of it as a free advert.

Andy

you knowfuck all stick to mending fans you has make 4 replys . Still you has not told the bloke waht is wrong with his boiller You are a fucken troll you know f*ck all.Go and mend fans

It seems Geoff has a fan club.

In message , "Simon (Dark Angel)" writes

You will not find anything about this in the flow chart ...

So, is it the pcb connector or the loom wire then?

It wasn't a pcb from me, was it, prolly the pcb con nector

Bloody hell, is it half term again ?

And, wouldn't have found the fault in the fault finding chart

Nowhere does it say "Is your pcb falling apart?"

Considering how many illiterate ill-mannered morons there out there, it's surprising how few we get in here.