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Old 12-01-2008, 08:47 AM   #1
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Pilot Light Will Not Stay Lit


I have an older gas furnace. The pilot light will not stay lit. I replaced the thermocouple and that did not work. Any suggestions? I am a rookie when it comes to furnaces and any feedback would greatly appreciated.

Thanks,

Arete01

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Old 12-01-2008, 09:19 PM   #2
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Pilot Light Will Not Stay Lit


Gas valve or other control problem.

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Old 12-01-2008, 10:55 PM   #3
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Pilot Light Will Not Stay Lit


The pilot flame has to be clean and impinge on the thermocouple. It can't be a yellow lazy flame. You probably need to clean the pilot burner orifice with a tiny wire. Most thermocouples are replaced because the pilot isn't clean.
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Old 12-02-2008, 04:34 PM   #4
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Pilot Light Will Not Stay Lit


If you can light the pilot and the flame is hitting the top 1/3 of the thermo and it's a blue flame then when you release the pilot light it goes out you probably have a gas valve gone bad. You also could have overtightened the new themocouple. With a good multimeter you tell if the thermocouple is getting the required heat to activate the magnet. Still thinking valve though.
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