Lennox Merit Series Furnace Startup Groan


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Old 02-11-13, 05:28 PM
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Unhappy Lennox Merit Series Furnace Startup Groan

Recently my Lennox furnace has started to occasionally make this horrific groaning noise. Some days we won't hear it, others we do. After startup if the furnace stays on for a longer cycle, the groaning usually goes away after a few minutes. I've captured a video of this and uploaded it to youtube, would someone kindly let me know what the issue is? Thanks!

Lennox Merit Startup Groan - YouTube
 
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Old 02-11-13, 06:01 PM
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Sounds like your induced draft motor requires replacement.
You may be able to oil it, but I'm not optimistic that it will help.
Looks like rain is getting in it.

 
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Old 02-11-13, 06:11 PM
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Roger Houston, thanks for the info.
I am curious what made you state that it looks like rain is getting in it? I can't see any obvious water markings. It was serviced about 2 years ago and unless the markings are new, the technician at the time didn't mention anything like that.
 
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Old 02-11-13, 07:04 PM
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Do you have a scary roof?
 
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Old 02-12-13, 10:27 AM
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The roof is fine, but I know what caused what you are seeing. Immediately above my furnace room is my kitchen, and one time a couple years ago the water line into my fridge broke, causing water to run down through the water line hole which runs from the furnace room into the kitchen. A bunch of water leaked down and some of it got onto the furnace. I dried it up and the furnace seemed fully functional. However I was a dolt to not spend more effort examining the furnace.
 
 

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