older Payne furnace won't come on


  #1  
Old 10-09-09, 08:23 AM
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older Payne furnace won't come on

I have an older (maybe 35 years old) Payne furnace that won't come on. The pilot is lit, the gas control knob is set to on, the thermostat is closing properly, 125 volts is getting to the furnace, and the transformer inside is putting out 28 volts. But nothing is happening--the burner isn't igniting (or getting gas) and the fan isn't running. Do I have a bad gas control unit?

Thanks,
Bill
 
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Old 10-09-09, 08:47 AM
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What kind of control board does it have? I would look at that first.
 
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Old 10-09-09, 09:40 AM
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Did you check for 24 volts on the gas valve?
 
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Old 10-09-09, 12:26 PM
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fixed it!

Well, I fixed it, at least for now: As a last resort, I smacked the gas control valve with a hammer a couple of times and it fired right up. I guess I just needed to get its attention. Thanks for the suggestions.

--Bill
 
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Old 10-09-09, 04:10 PM
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I think, since you said it was an older Payne furnace I am going to guess it has a two wire bi-metal safety pilot. When tapped the valve you only helped it come on. Check and see if the pilot is as I mentioned and if it is, is it showing any yellow tipping. If yes, the pilot needs cleaning so it imoinges on the bi-metal strip properly. If it has a thermocouple in the pilot forget what I just wrote.
 
 

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