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Boiler won't start

We have replaced our ignitor and our burner now when I watch the boiler light there doesn't seem to be enough gas shooting in. I'm not sure but I think I need to adjust the pressure. How do I do that?

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Near one corner of the gas valve is a slottedplug.
It looks like large screw headremove the plug just like any screw. This lets you access the gas pressure adjustment screw.
Usually no more than one half to one full turn is needed. (clockwise to increase pressure)

It is important that you not have to much Gas pressure as this will cause overheating and premature heat exchanger failure.

The best thing to do is check the pressure going into the gas valve, and also coming out. Make sure the inlet side of the GV is not partially clogged where the pipe comes in. (especially if you have copper pipe with natural gas)

Posted on Jan 10, 2009

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1 Answer

I have a halstead finest gold combi when I turn the boiler on the boiler goes into its ignition sequence when it comes to ignite the boiler fires but after the igniter stops the boiler cuts out completely...


Difficult to get too specific without knowing if you have gas or oil. Also, I am going under the assumption you mean the burner shuts down, not the whole heating system. That being said, all heating appliances have whats called a safety curcuit. Each control has the ability to shut down if certain critera are not met. There is a sensor that senses light down the blast tube. If no light is sensed in a predetermined time period, then the sensor cuts power to the burner. This stops delivery of fuel so if it does ignite you wont blow up.
(I suspect that the ignitor and burner shut down simultainously.)
It may be the sensor (cad cell eye) is doing its job, however why is the question. Could be a number of things including the fuel delivery, ignition, improper air adjustment, etc.
No qualified professional should diagnose a problem unless they are in front of the appliance. I recommend you find a licensed qualified heating techician. Hope this helps.

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Good Question!-- Let's see if we can figure this out--

What kind of fuel are we talking about? - Gas or Oil?

Any clue as to WHY the boiler stops?--
Can you see a water level, or a temperature or a pressure setting/ gauge?
Tell us what some of these readings are--

If it is gas-- how does ignition take place?-- Spark, or ignitor ignition?

Where is the Reset button?-- is it on the burner control-- or the water level control?

Tell us more--

Mack B

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