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Old 03-05-2012, 08:03 AM   #1
kris77 [OP] kris77 is offline
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Furnace questions...

Recently I had to reinsulate my heating ducts. They are working fine. But the cold air return vents are blowing Freezing Cold air. I don't know enough about this stuff to figure out why they are blowing cold air.

Its making my house freezing cold right now. Any ideas on where to start?
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Old 03-05-2012, 08:05 AM   #2
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Did you disconnect any of the ducts to insulate them?
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Old 03-05-2012, 01:38 PM   #3
kris77 [OP] kris77 is offline
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No, I didn't even touch the return ducts. It was blowing cold air before i even touched it though.
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Old 03-05-2012, 01:39 PM   #4
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What kind of furnace? oil, natural gas? How old is it? Are you getting air out of the other ducts?
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Old 03-05-2012, 01:47 PM   #5
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Cold air returns should draw air not blow it
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Old 03-05-2012, 01:52 PM   #6
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Quote:
Originally Posted by OZ-T View Post
Cold air returns should draw air not blow it
Hence the problem.
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Old 03-05-2012, 03:37 PM   #7
I've seen things you people wouldn't believe ....
OZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shedOZ-T is one of the sharper tools in the shed
 
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Sounds like there might be an in line damper somewhere that was accidently opened when insulating ?
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Old 03-05-2012, 05:13 PM   #8
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Quote:
Originally Posted by kris77 View Post
Recently I had to reinsulate my heating ducts. They are working fine. But the cold air return vents are blowing Freezing Cold air. I don't know enough about this stuff to figure out why they are blowing cold air.

Its making my house freezing cold right now. Any ideas on where to start?
How old is the house?
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Old 03-05-2012, 05:47 PM   #9
kris77 [OP] kris77 is offline
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Lets see if I can answer most of the questions here.

Gas furnace. Build in 85. The returns draw air when its on, but as soon as the fan kicks off, they blow cold air.

And they blow enough to make it very uncomfortable on your feet. I crawled under the house today and the return lines aren't sealed very well. I guess I could start from there. Take those down and redo them right.
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