Build up inside the burn chamber


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Old 01-06-09, 04:35 PM
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Question Build up inside the burn chamber

hi. i have been having a problem with my boiler cutting out due to overheating. It was cleaned out inside and this seemed to sort it but it's started again. There is a black build up on the metal directly above the burners where the water passes through, it appears to be a carbon like coating. Could this be causing the problem and is there an easy way of removing it? Its the boiler which heats the central heating.

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Last edited by geezer717; 01-06-09 at 05:03 PM.
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Old 01-06-09, 05:24 PM
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What make/model boiler, and what fuel ? oil / gas ?
 
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Old 01-06-09, 05:27 PM
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it's gas powered. I'll have to check the make when im back ther. Wll post later
 
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Old 01-06-09, 05:30 PM
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You should not be getting any soot buildup !

Describe the flame when the burner is firing... what color flame?

Are there CO detectors in the home?
 
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Old 01-07-09, 12:52 AM
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Ok. the boiler is a glowworm economy plus. The flame is blue along the bottom but seems to be flaring into an orangey yellow further up.
by CO detectors do you mean Carbon monoxide detectors? if so theres one with the water boiler but not with the central heating boiler.

cheers
 
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Old 01-07-09, 02:37 PM
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That flame should not flare into an 'orangey yellow' ... You've got a combustion problem that should be taken care of...

By CO detectors, I mean Carbon Monoxide, and there should be several in the home ... not right on the boiler or water heater, but in the bedrooms, etc...
 
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Old 01-07-09, 03:01 PM
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thanks for your help so far.
what would you suggest could be the cause of this? are there likely to be many causes? And should the boiler be off until then? thanks in advance
 
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Old 01-07-09, 04:07 PM
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Possible causes:

Insufficient combustion air.

High gas pressure / misadjusted / defective gas valve.

Mis-adjusted air gates on burners.

ummmm... probably others, but those come to mind.

I wouldn't waste much time getting the system serviced. These situations are the ones that can and do produce excess CO, and we know what that can do.
 
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Old 01-07-09, 04:33 PM
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would this also cause the boiler to cut out as it has been?
With regards to your suggestion. Should I start by reducing the gasflow on the gas valve then try the air gates on the burners.
 
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Old 01-07-09, 05:35 PM
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No idea why it's cutting out, and no, I don't recommend you do anything with it yourself... playing with fire is not a good thing, especially when there's a gas valve involved.
 
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Old 01-12-09, 09:44 AM
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cheers so far. Im calling someone in to see it. What should I say to them to ensure I dont look like someone who is going to be easily ripped off? Apparently the gas valve is cutting out, there is a distinct click when it goes off. Could it simply be a faulty gas valve and the poor burning is an unrelated issue?
 
 

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