Yellow flames from burner

[Agile]

If the cast iron heat exchanger is leaking then it is the end of life of the boiler.

All these problems demonstrate how important it is to have boilers regularly serviced so any problems are dealt with at the earliest opportunity.

So you can push a 7mm rod through a hole?

A lot of these boilers are removed and scrapped. If only there was a way to correlate when someone needed obsolete parts!

Tony

 

[John Brown]

Hi Tony,
Yes a 5mm rod would probably be able to be pushed through the hole in the top of the burner (the bit where the flames come out). possibly 7mm. Is that bad bad?

I assume signs of water in the bottom of the boiler when cold would indicate a leaking heat exchanger or would we need to trace where that water was coming from first?
Thanks

 

[Steelmasons]

But all I can say is that I would expect to be able to cure it.

All I can say is that I am so confident that I could cure it, that if you were local, I would come to you on a no fix/no fee basis!

Tony

 

[Agile]

If there is a hole that size then the flame shape would probably be badly wrong.

It would also be wrong for any engineer to leave it working but I am surprised you said he cleaned it as if there was no hole!

Any leaking HE is the end of the boiler but on startup there can be condensate dripping off the HE.

Tony

 

[John Brown]

He hasnt left it working - its fully switchied off at the main valve. He cleaned it and tried it but i think somewhere after cleaning the corroded section must have burnt through or fallen through so now the hole remains.

Just to clarify, I assume there would be signs of water in the bottom of the boiler when cold which would indicate a leaking heat exchanger or would we need to trace where that water was coming from first?
Thanks

 

[Agile]

Some boilers leak when hot only and others only when cold, or all the time.

I don't think yours has been leaking. When they do they usually make a very corroded mark on the burner.