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Old 10-30-2009, 06:45 PM   #31
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Lennox furnace - no heat


Open. Study this:http://tech.lennoxintl.com/PDFs/0006j.pdf.
Quiz later
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Old 11-03-2009, 06:46 PM   #32
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Lennox furnace - no heat


Thumbs up to hvacpartsshop.com! I emailed them asking for a replacement tube....they only sold them in big packages for $20. Being the cheapest that I could find, I was going to order a pack and then found out they were local. When I went to pick it up, they simply gave me a few pieces since I didn't need an entire pack. Seemed like a great place to buy parts from!
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Old 01-19-2011, 07:34 PM   #33
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Lennox furnace - no heat


Quote:
Originally Posted by yuri View Post
Post the model and serial # of the furnace. I am a Lennox tech.
Hi,

I'm having problems with my lennox furnace. Air is flowing through the vents but no heat. And there's no light on . No code showing either.
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Old 01-19-2011, 07:37 PM   #34
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Lennox furnace - no heat


Does anyone know why a furnace's burner is not igniting? Could it be the humidifier with added to the house?
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Old 01-20-2011, 07:35 AM   #35
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Lennox furnace - no heat


Better to start a new thread but...

Besides checking flame sensor 'connection', try cleaning sensor by one of the burners with emery cloth, fine steel wool or sandpaper.

For expert techs post model # of unit

Tell what point you are at:

1. Combustion fan/induction fan/ventor fan comes on
2. Pressure hose jumps, air pressure switch closes
3. Ignitor glows
4. Gas valve opens, burners light
5. Blower motor starts
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Old 10-27-2011, 01:08 PM   #36
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Lennox furnace - no heat


It is fixed. Thanks.

Last edited by xuzhang; 10-27-2011 at 02:46 PM.
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