Boiler not firing

dcooper1 · 25 Sep 2006

I have a Gloworm ultimate boiler, which is failing to fire.
The system is a conventional open system.
The pump is running and the pilot light is lit. When the controller signals for the boiler to fire you can hear a 'click' from the boiler as it tries to fire.

Any help much appreciated

Thanks

David Cooper

OllieN · 25 Sep 2006

Maybe the solenoid. Have a read....

//www.diynot.com/forums/viewtopic.php?t=53818

Agile · 25 Sep 2006

Have you recently relit the pilot?

Is the gas valve knob in the "run" position?

Tony

dcooper1 · 25 Sep 2006

Tony,

1.) I have not lit the pilot light recently
2.) Gas valve is on

regards

Dave

Agile · 25 Sep 2006

Exactly what is the click coming from?

Tony

dcooper1 · 25 Sep 2006

Tony,

i'll investigate further tonight

thanks

Dave

ChrisR · 25 Sep 2006

Gas valve might be sticking closed. It's easily accessible - on the right hand side behind the lower cover. If you're lucky it'll open if you give it a tap with a medium sized screwdriver handle, though an electrical test would be worth doing first (see that other thread).

dcooper1 · 26 Sep 2006

Tried tapping gas valve, but no luck. I have checked for power at solenoid and reading 240v.

When boiler tries to fire a click can be heard? not sure exactly where this is coming from but would this be the solenoid valve opening?????

ChrisR · 26 Sep 2006

If you disconnect and measure the solenoid resistance and it's correct at a few thousand ohms, you may need a new gas valve.

OllieN · 26 Sep 2006

Would hazard a guess that the click may be a relay switching the 240v on? Try doing the swap of main valve and pilot valve solenoids (as discussed in the other thread) to see if it is a solenoid problem. If the solenoid has failed then after the swap the pilot light should not ignite when requested

Agile · 26 Sep 2006

Surely this is a permanent pilot light boiler Ollie?

geoff@cetltd · 26 Sep 2006

A bit of a waste of a sequence board if it is ...

The pcb is basically like a fuelsaver with lights

OllieN · 27 Sep 2006

Agile said:
Surely this is a permanent pilot light boiler Ollie?

Maybe they do both then? I have a Gloworm Ultimate at home which is not a permanent pilot light as I went through the swapping solenoids route to try and diagnose the same problem as the OP is having. Bizzarely swapping the solenoids fixed the boiler and it's still going string now (maybe a stuck valve or loose connection that i made better - who knows)

dcooper1 · 2 Oct 2006

Replaced solenoid at the weekend (cost about £30) and all working okay!
Thanks for the help

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Boiler not firing

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