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Old 02-07-2010, 07:08 PM   #1
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Damper door on Furnace not opening all the way


I have a Lennox Whisper Heat forced hot air gas furnace. It uses a damper to close off the burner area when there is no call of heat. (Stop room air going up the flue).
Thermostat calls for heat
-damper door opens, IPI green lights come on
-Burner comes "On" in case the damper got stuck that the burner would not be allowed to fire up until the damper is fully open.
An that's exactly whats happening. The damper tries to open all the way but gets stuck and keeps clicking so that the furnace wont ignite.

For now i placed something there to force it to stay open , i hope i'm not damaging anything, but it is extremely cold and i don't have to many choices.

Does anyone now how i can fix this.
Thanks

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Old 02-07-2010, 07:25 PM   #2
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Damper door on Furnace not opening all the way


Buy a new damper door motor from Cozyparts.com. The gears are stripped in yours. NOT an easy part to change, you may want to get a Lennox tech to do it.

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Old 02-07-2010, 07:30 PM   #3
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Damper door on Furnace not opening all the way


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Buy a new damper door motor from Cozyparts.com. The gears are stripped in yours. NOT an easy part to change, you may want to get a Lennox tech to do it.
Thanks for your reply.
Is it ok for now to force the damper to stay open so it keeps igniting whenever heat is called for?
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Old 02-07-2010, 08:17 PM   #4
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Damper door on Furnace not opening all the way


NO. You can damage the end switch which is attached to the other side of that door and its spring. It is a difficult part to replace that motor and get the door etc lined up properly if you have never done it B4. Several special techniques are required to do it and it usually takes an experienced and patient tech to do it. I have worked on hundreds of them and it is the furnace I love to hate. If you have to gently move it fine, but I would not be surprised if the switch fails in the future.
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Old 02-07-2010, 08:37 PM   #5
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Damper door on Furnace not opening all the way


Have the heat exchanger checked while the tech is there. Most fail too early so you could be looking at a damper actuator(parts and labor) and a heat exchanger(labor and shipping if the part is still in warranty). Could get expensive quick.
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Old 02-07-2010, 08:45 PM   #6
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Damper door on Furnace not opening all the way


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NO. You can damage the end switch which is attached to the other side of that door and its spring. It is a difficult part to replace that motor and get the door etc lined up properly if you have never done it B4. Several special techniques are required to do it and it usually takes an experienced and patient tech to do it. I have worked on hundreds of them and it is the furnace I love to hate. If you have to gently move it fine, but I would not be surprised if the switch fails in the future.
Yuri, my disinherited son has a Whisper Heat. Let's see his bigshot engineering degree get him out of a break down.

He won't get any help from me.
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Old 02-08-2010, 05:38 PM   #7
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"Disinherited"?? What went wrong? Now you can leave all your loot to me.
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Old 02-08-2010, 07:06 PM   #8
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"Disinherited"?? What went wrong? Now you can leave all your loot to me.
You???

You ain't even invited me for for coffee! What would Baba ans Dido say?
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Old 02-08-2010, 07:16 PM   #9
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BOB. Bring yer own Booze. LOL
We buried them oldies a long time ago. The Commie might become president of the Ukraine and back to the Cold War. Oy Vey.
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Old 02-08-2010, 07:22 PM   #10
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BOB. Bring yer own Booze. LOL
We buried them oldies a long time ago. The Commie might become president of the Ukraine and back to the Cold War. Oy Vey.
Shalom!

Haven na gila! Haven...
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Old 02-08-2010, 07:38 PM   #11
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Mom was born in Czechoslovakia. They had Gypsies, Jewish, German peoples and constantly rotating borders. The language was a stew of all of them.
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Old 02-08-2010, 08:28 PM   #12
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Mom was born in Czechoslovakia. They had Gypsies, Jewish, German peoples and constantly rotating borders. The language was a stew of all of them.
Heh, get up around the Greek Albanian border and try to talk to them.
You got Albo, Turk, Greek and Gypsy mixture. I don't know what it's called either.

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