yellow flame in gas fire

Hello all. I have a gas fire.

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the middle 2 bars burn blue with the top quarter yellowish. The outer two bars are blue / orange normal

I have cleaned the jets that feed the venturi (?) and the venturi (?) itself

the venturi is the block with the holes in that the gas burns from. (i think)

Why is this ? the flue/chimney is good with air being drawn through and besides, the outer two bars are ok.

tia

Reply to
Fray Bentos
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Does it tend to spend most of its lit life with just the inner two burners on? When this is the case, you often see a difference in the colour of the centre burners after a while. I presume this is due to accumulation of combustion deposits on the radiant reflector and grill.

Reply to
John Rumm

Just to be double sure take the venturi / flame mesh assembly off an wash it under the tap (flush in both directions) to make sure no lin or anything remains, all the mesh the flame comes through is clear an no fluf (lint) lurking within/beneath. To check operation of jets o for blockages in the tubes you would need to gas rate the fire. I everything is clean, it passes the gas rate test flue flow test an spillage test with flying colours, you're probably OK as far as I ca say without seeing it

-- Paul Barker

Reply to
Paul Barker

It is 6 years old and yes, it is rare to use the outer 2 bars. When its heated up, you can see the flames in the inner 2 bars. Never used to be like that.

tia

Reply to
Fray Bentos

It's quite difficult to clean this well, it becomes blocked with dust of all kinds including particles of rust. I spend ages pricking each hole with a fine sewing needle, prodding it several times. It does help. The ideal solution would be to blow out the dirt in the same direction as the gas flow but we can't do that easily with ours.

Mary

Reply to
Mary Fisher

A yellow flame is an indication that less than the optimal amount of oxygen is being using during combustion and some carbon is being produced (carbon monoxide will also be produced under these circumstances but as long as you have a good draw on your chimney that's not a problem). I am not a gas fire specialist, BTW, but that is why the flame is yellow.

Graham

Fray Bentos wrote:

Reply to
doozer

I have it fixed. I vacuumed out the venturi. Must have been a bit clogged inside. Rather than disconnect it all, I had the ingenious idea of using a straw taped onto the end of a vac pipe. worked a treat.

fray bentos

Reply to
Fray Bentos

Excellent idea. I'll try it next time I need to.

Mary

Reply to
Mary Fisher

I've just had this vision of a vacuum cleaner turning into a jet engine, if you should happen to try this without switching the gas off first ;-)

Reply to
Andrew Gabriel

Well, it's a nice image but think about it. The gas wouldn't be turned on unless thee was a flame. If there was a flame it would be too hot to get near ...

Mary

Reply to
Mary Fisher

replying to Fray Bentos, Aamir wrote: U still available this

Reply to
Aamir

I wonder how old this was? Brian

Reply to
Brian Gaff (Sofa 2)

Stop chucking salt at it.

2005.
Reply to
Max Demian

Really, well, I've given up looking these days. The daft thing is this system home owners club must be one of the rare cases where the date is mega visible on a post for a blind user, but obviously invisible to a sighted one, unless they are all so stupid they cannot understand the date? Weird like. Brian

Reply to
Brian Gaff (Sofa 2)

I?ve explained before Brian but you?ve obviously missed it.

Yes, the date is plain as day if you follow the posted links BUT HOH likes to throw up old posts as new posts on the front page of the site inviting responses. These re-posts have no visible date.

If you click on the ?Need your advice? tab or the ?recently answered? tabs on the home page, you won?t see any dates.

It?s not that HOH users are incredibly stupid, it?s the stupid way that posts without dates are promoted.

Tim

Brian Gaff \(Sofa 2\) snipped-for-privacy@bluey> Really, well, I've given up looking these days. The daft thing is this

Reply to
Tim+

15 years!
Reply to
The Other John

I have been caught out a couple of times. I don't use HOH - Thunderbird works fine for me - but while Googling for something, I have occasionally seen a post that has caught my attention, with no obviously visible date, and replied to it.

SteveW

Reply to
Steve Walker

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