My boiler wont light?

HI guys,
first I gota say this web site is amazing!

I have a Fuelsaver 55ff and it's just stopped working, I out in the whole central heating system myself and am a qualified carpenter so I'm not bad with my hands.
Can you help, I think its the fan as the first neon is on but second is off and its not trying to light. It says this is either water diff pressure switch, or faulty pump.
Pump is turning fine, but reading the above should the extractor fan be turning? mine isnt? I am going to attemp to blow in the tubes next but not sure which one is which :)
maybe I shall look for a few more threads first.
Any help getting this back going would be mucho appreciated.

Alan

Alan B
June 2005

take the tubes of the air pressure switch in one of the tubes blow in gently and in the other suck.also check the venturi is not blocked with spiders web.THEN FIRE THE BOILER AND LISTEN TO CLICKING SOUND.IF YOU HEAR THIS SOUND THE YOU ARE LOOKING AT YOUR IGNITION BOARD OR PCB OR GAS VALVE.IF THE IGNITION IS TICKING AWAY AND THERE IS VOLTAGE AT THE GAS VALVE THEN THE GAS VALVE IS FAULTY.IF THE IGNITION IS TICKING AWAY AND THERE IS NO VOLTAGE AT THE GAS VALVE THEN THERE IS A PROBLEM WITH THE PCB. 07710230494

SHAHZAD
January 2005

Did you manage to fix this problem? Mine is doing the same thing! It lights, runs and then when it goes off, sometimes it doesn't come back on (although the fan often runs).

Have found that a gentle tap to the side of it sometimes makes it kick in

Paul
November 2004

If it doesnt even try to light ie there is no clicking then the boiler hasnt proved that it is safe to light. When the boiler first kicks in the fan should start and when the air pressure switch picks up that the fan is running and everything is ok it tells the boiler to start the ignition sequence, so chances are it is either the air pressure switch or possibly the cuircuit board

Steve
September 2004