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Old 09-09-2011, 09:37 PM   #1
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Furnace Gas Valves


I have a Miller natural gas furnace in a moble home. The old gas valve, the pilot would not light at all, not even light and then go out. I installed a new gas valve and the same thing is happening. Does any one have any ideas?

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Old 09-09-2011, 11:59 PM   #2
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I have a Miller natural gas furnace in a moble home. The old gas valve, the pilot would not light at all, not even light and then go out. I installed a new gas valve and the same thing is happening. Does any one have any ideas?
I have a technical thought: how do you know you even have gas supplied to the gas valve? Do you have a manometer to check gas pressure at the valve?

It is possible that the gas cock or anywhere before is clogged, not allowing gas to the unit thus no light.

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Old 09-10-2011, 02:47 AM   #3
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I have a Miller natural gas furnace in a moble home. The old gas valve, the pilot would not light at all, not even light and then go out. I installed a new gas valve and the same thing is happening. Does any one have any ideas?

Not the gas valve at fault? Did you install a new thermocouple/pilot light?
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Old 09-10-2011, 04:48 AM   #4
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Could also be that the pilot burner is dirty, and not letting any gas come out.
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Old 09-10-2011, 08:03 AM   #5
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Furnace Gas Valves


How long have you attempted to light the pilot, did you purge the line after replacing the valve. The orfice in which gas flows through for you pilot is very small and it takes a fair amount of time to actually get gas to the pilot port.

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Old 09-10-2011, 10:25 AM   #6
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remove the pilot gas tube from the valve to the assembly blow into it eye ball it for stuff...but as suggested verify gas at the valve...by removing the pilot tubing do you smell a slight gas scent there?
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Old 09-10-2011, 01:32 PM   #7
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Pay your bill haha
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Old 09-10-2011, 02:45 PM   #8
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A very common problem is a dirty pilot.After years of burning gas and the heat that that produces tend to slowly plug up the orfice.
I would buy a new pilot as they are not that expensive.You just have to make sure the flame reaches a burner and the thermocouple.
You could try to clean it and use a pin to bring it back to original size but people tend to over do this and increase the opening too much which will kill a thermocouple in short order.
Being that it is old,I think the gas pressure should be checked,both the incoming and out going pressure.
There really isn't a lot that would cause a simple pilot to fail.Now if you have a spark ignition then there are a whole nutter bag of dirty tricks to look for.
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Old 09-10-2011, 04:17 PM   #9
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Pay your bill haha
Me likey.

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