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NeedAdvice

07:22PM | 06/06/05
Member Since: 06/05/05
4 lifetime posts
Bvhvac
I need some advice. I turned on my central air today and noticed that no air is coming out of the vent in my son's room. Just moved into a 4 bedroom, 2 story house with about 9 vents. Home was built last year. This is the only vent without air coming out. I removed the vent cover and could hear air moving in the ducts, but couldn't see any obstructions and no air was coming out. Any thoughts or advice would be appreciated.


Fizban

02:59PM | 06/14/05
Member Since: 06/13/05
7 lifetime posts
If the home was just built, there's a possibility that the vents weren't adjusted for airflow to each room. The one to your son's room may be closed at the furnace end. Look at the ducts going to that area of the house with attention for one that's set completely different from all the others.

NeedAdvice

03:39PM | 06/14/05
Member Since: 06/05/05
4 lifetime posts
Thanks for your reply. This house is built on a slab. I have a closet in the garage with the furance and hot water heater. Therefore, I can't see any visible duct work going to different parts of the house. Please reply back if you have any additional suggestions based on this info. Thanks in advance.

Billhart

05:04PM | 06/14/05
Member Since: 04/25/05
1915 lifetime posts
If this house was just built last year the builder is responsible for getting it to work.


NeedAdvice

06:46PM | 06/14/05
Member Since: 06/05/05
4 lifetime posts
We bought the house from the woman who bought it from the builder. Her 11-month (and final walk-through waranty) was up around the time we closed about 3 weeks ago. I believe I'm on my own.


Fizban

03:53AM | 06/15/05
Member Since: 06/13/05
7 lifetime posts
Just crawl under the slab and have a look! Just kidding. Is the duct located near the ceiling or floor?

If the ductwork goes under the slab, the duct is likely on the floor and may have gotten blocked during construction.

If the duct is near the ceiling, the ductwork probably goes through your attic, where you'll have a fun crawl to see what's what.

But, try this. Turn off your furnace (at the furnace). Take the grate off the duct and feed an unattached garden hose back through from the bedroom. Be sure to remove the nozzle from the hose (so it can't get caught on anything). Feed the hoze back through the duct until it runs into something, or it reaches the furnace - whichever comes first.

If it runs into something other than the furnace, put a mark on the hose so you can determine approximately where the obstruction is. Listen for the sound it makes when it hits. Is it metalic? If so, that's either where the valve is or where the pipe may have collapsed. Pull the hose back out and see if there's any dirt or sand in the end (an under-slab duct may have gotten flooded or accidentally collapsed and filled with dirt during construction.

The mark on the garden hose will tell you approximately where you should begin your search. If it's near the grate, you may be able to see the obstruction with and a flashlight.

Give it a whirl and let us know what you find.

NeedAdvice

07:33AM | 06/15/05
Member Since: 06/05/05
4 lifetime posts
Thanks for your suggestion. I'll give it a try. In the meantime, I just wanted to clarify that it is an upstairs bedroom and the vent in on the floor.


Fizban

11:44AM | 06/15/05
Member Since: 06/13/05
7 lifetime posts
Two floors! Ah... then I'm guessing the ductwork goes between the floors. Can you tell by looking at the furnace?

I'm guessing there's a large (main) duct that's in the downstairs ceiling. It likely goes right down the center of the house (probably above a hallway ceiling). It may, or may not have grates along its length to send heat downstairs.

The obstruction would have to be between your son's room grate and that large duct.

In the previous message I said that you may be able to see something using a flashlight, I forgot to add "and a small hand mirror" to that statement.

Just curious. Is your son's room at the opposite end of the house from the furnace?
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