Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-07-2011, 02:02 PM   #1
Newbie
 
Join Date: Oct 2011
Posts: 1
Share |
Default

Cold air coming out from vent once furnace stops


I really need your help to figure out what's going wrong.

Bought a house (built in 2006) with furnace located on attic. At night, when it's getting cold, the furnace starts to work, and it's fine. But when it stops, I can feel some cold air coming out from vents.

Even worse, the downstairs has no such problem. it only happens in two upstairs bed rooms!

My wife did a quick search and suggested it's back draft damper problem. But why other rooms are OK if it's damper problem.

I check the duct tape and it seems OK.

Thanks for your any advice.

Best

Neil

neilkent is offline   Reply With Quote
Old 10-07-2011, 04:37 PM   #2
Retired from the grind
 
gregzoll's Avatar
 
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 13,992
Default

Cold air coming out from vent once furnace stops


The main question is, are the ducts insulated. If you are getting cold air after the unit stops running, there is air leaking into the duct work some way, which needs to be checked out.

__________________
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is online now   Reply With Quote
Old 10-07-2011, 05:25 PM   #3
Member
 
Join Date: Oct 2009
Location: Nebraska
Posts: 2,362
Default

Cold air coming out from vent once furnace stops


I'd like to know a real temperature of the air please. Also measure the temp at the other vents upstairs so we have something for a comparison.
Marty S. is offline   Reply With Quote
Old 10-07-2011, 07:02 PM   #4
I'm Your Huckleberry
 
Join Date: Mar 2011
Posts: 5,611
Default

Cold air coming out from vent once furnace stops


So the heat cycle satisfies and the heat stops but in two rooms only you can continually feel air as if the blower is still spinning? Is that right? That strong?

For how long? And as Marty has already asked, we'd need some air temperatures, please.
Doc Holliday is offline   Reply With Quote
Old 10-07-2011, 08:18 PM   #5
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,622
Default

Cold air coming out from vent once furnace stops


was it always like this upstairs?is the return ducted to the back of the attic unit?is the attic cold when the unit is running?also a biggie here check 360 degrees around the 2 conections of the furnace make sure the bottom is sealed tight on that return and supply.is the furnace induced draft or static vented?......just asking
biggles is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gas furnace exhaust vent question nowell HVAC 7 01-30-2012 08:31 AM
Condensation in Gas Furnace Vent Pipe chanco HVAC 2 01-08-2011 04:01 PM
Attic Ventilation Question handy man88 Roofing/Siding 10 02-12-2010 10:50 PM
New Cased Coil - Install to Furnace - PICTURES!! hartkem HVAC 39 11-18-2008 01:45 AM
Furnace stops working once a day - help Da_Bears HVAC 2 01-26-2006 01:19 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.