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Large yellow flame
iizbor3d
Member Posts: 40
I suddenly noticed on my Williamson GWA-140 a bright yellow light coming through the front cover that was never this evident. It seems to me the pilot flame is large and very yellow. Only work recently done was the chimney was relined from clay to steel. The gas valve is the original one from 2011. I also noticed the thermocouple seems very charred possibly melted? I've cleaned the burners and the pan below before the heating season. Is it time for a new gas valve?
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Some possibility of clean the pilot burner so it can get enough air and possibly turn down the adjustment for the pilot burner or maybe make sure something hasn't happened to the orifice in the pilot burner like it loosened up or got damaged in some weird way.0
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I'd say you need a pro. Could be a gas valve. Could be a gremlin bored out the pilot orifice when you we're looking. Hope you shut off the gas supply.
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get a new pilot assembly. how is that even functioning0
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New pilot assembly ordered, chimney guys definitely didn't do a combustion test. I've been intrested in getting my own combustion analyzer, is Testo brand the recommended one? Will be replacing gas valve also.EBEBRATT-Ed said:You need a new pilot assembly, and have the draft checked, make sure the boiler flue passages are clear and have them do a combustion test. It should have been done when the chimney was worked on
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Yes , Testo is VG0
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iizbor3d said:
You need a new pilot assembly, and have the draft checked, make sure the boiler flue passages are clear and have them do a combustion test. It should have been done when the chimney was worked on
New pilot assembly ordered, chimney guys definitely didn't do a combustion test. I've been intrested in getting my own combustion analyzer, is Testo brand the recommended one? Will be replacing gas valve also.
I'm currently using the Testo 300 which I like a lot more than the 310.0 -
HVACNUT said:iizbor3d said:
You need a new pilot assembly, and have the draft checked, make sure the boiler flue passages are clear and have them do a combustion test. It should have been done when the chimney was worked on
New pilot assembly ordered, chimney guys definitely didn't do a combustion test. I've been intrested in getting my own combustion analyzer, is Testo brand the recommended one? Will be replacing gas valve also.
I'm currently using the Testo 300 which I like a lot more than the 310.0 -
your problem does not appear to be the gas valve. Maybe 30 years of a misadjustment of the pilot regulator/valve but not likely something actually broken in the valve.0
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mattmia2 said:your problem does not appear to be the gas valve. Maybe 30 years of a misadjustment of the pilot regulator/valve but not likely something actually broken in the valve.0
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Got a Testo 310 results seem good except for the draft test.
CO: 2ppm
CO2: 6.78%
O2: 8.9%
Eff: 80%
Tstack: 392 F
The draft would keep bouncing between 0 to -0.004"wc when inserted 6" above the boiler. The draft would mostly hold on 0. However if I insert the probe into the draft hood the draft would be between -0.004 to -0.008.
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