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Discuss Pilot light in boiler keeps going out, but only when boiler is warm in the Central Heating Forum area at PlumbersForums.net

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Hi all,

Just looking for some advice really.
I have a Glowworm Ultimate boiler which looks like this:

I have a very strange problem with it in that if the boiler is cold and I switch it on, the pilot light comes on, stays on and the boiler kicks in fine. However, after around 20 minutes, the pilot light starts going out every few seconds and the boiler sparks to re-ignite the flame. It's a blue flame, I can't see any orange.
If the boiler has already been on for a while, if I turn it off for 15 minutes or so and then start it up again, it ignites fine but then after 5 minutes or so, I have the same issue with the pilot light again.
It's as though the issue with the pilot light is dependant on how warm the boiler is.

Would this indicate that the thermocouple needs replacing?

Thanks for any assistance :)
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
As your not gas safe please put the cover back on and call a pro in
 
Hi Shaun, I haven't taken the cover off - boiler in the video isn't mine, it's just the same model.
I'm just looking for some advice on what the problem could be.
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Hi Shaun, I haven't taken the cover off - boiler in the video isn't mine, it's just the same model.
I'm just looking for some advice on what the problem could be.
That’s good but I’m afraid you would still need a registered gas engineer to sort the issue as it’s a boiler fault sorry to say
 

Harvest Fields

Esteemed
Plumber
Gas Engineer
Advent Win
Hi Shaun, I haven't taken the cover off - boiler in the video isn't mine, it's just the same model.
I'm just looking for some advice on what the problem could be.
No worries mate. You still need a registered gas engineer to sort you out on this one.
 
That’s good but I’m afraid you would still need a registered gas engineer to sort the issue as it’s a boiler fault sorry to say
Yep, I'm definitely going to call a professional out, I don't intend trying to fix this myself.
I'm asking about this issue so I can get a better idea of the problem, so I can get a better idea of how much I would be looking at paying a professional to fix the issue. I've moved to a new area and I don't know anyone around here yet, so if someone just came along and told me they'd have to fit a new boiler, I wouldn't have anything else to go on.
 

chris watkins

Esteemed
Plumber
Sorry but any info we would provide could allow someone else to have a go at fixing theirs & they would be breaking the Law.
Phone a couple of 'Registered Professional Gas Engineer' up explain the problem & get them to give you a price.
 
Last edited:

centralheatking

Esteemed
Plumber
Hi all,

Just looking for some advice really.
I have a Glowworm Ultimate boiler which looks like this:

I have a very strange problem with it in that if the boiler is cold and I switch it on, the pilot light comes on, stays on and the boiler kicks in fine. However, after around 20 minutes, the pilot light starts going out every few seconds and the boiler sparks to re-ignite the flame. It's a blue flame, I can't see any orange.
If the boiler has already been on for a while, if I turn it off for 15 minutes or so and then start it up again, it ignites fine but then after 5 minutes or so, I have the same issue with the pilot light again.
It's as though the issue with the pilot light is dependant on how warm the boiler is.

Would this indicate that the thermocouple needs replacing?

Thanks for any assistance :)
Yes its the thermo . but you will need the Glowworn looking at properly
universal thermos are about £15.00 but need expert 'Registered Professional Gas Engineer' fitting
centralheatking
 
Thanks a lot for your help Centralheatking.
You've put my mind at rest.
You're not in the Dorset area by any chance are you?
Cheers,
Andy
 

Harvest Fields

Esteemed
Plumber
Gas Engineer
Advent Win
Thanks a lot for your help Centralheatking.
You've put my mind at rest.
You're not in the Dorset area by any chance are you?
Cheers,
Andy
Don’t think that he is. He also isn’t Gas safe registered and shouldn’t comment on such issues on an open forum.
 
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