01:51PM | 06/21/00
Member Since: 06/20/00
2 lifetime posts
We have a very noisy return on our duct work after having a new central air conditioner installed. There is a loud banging noise when the unit comes on and shuts off. Suspect this is a vacuum problem which rattles the duct work because the loudest bang comes after the unit has been off several minutes. What can be done? The return in on the second floor near the bedroom and is very annoying.


02:15AM | 06/23/00
Member Since: 02/19/00
206 lifetime posts
AC blower speed is generally at a higher speed when calling for cooling. Return air ducts must be sized correctly and be able to compensate for the added restriction (evap) on top of your furnace.


06:21PM | 06/23/00
Member Since: 06/02/00
12 lifetime posts
Metal duct expands and contracts as it is heated and cooled from operation. I wonder if it is not the duct work popping because a support has come loose. Metal duct work will transport noise long distances so it may be coming form the return on the side of the furnace. Go down to the unit and when it shuts down see if the noise is louder. If you have exposed ducts gently push on the large duct work and see if you can make it pop or make a noise similiar to what you are hearing. And if it is a new system get the dealer out there to solve it.


07:59AM | 08/01/00
Member Since: 03/13/00
1675 lifetime posts
If you still haven't had any success, try this. Open the cover of the return and remove the filter. (I assume that's where the filter is) Try to determine if the duct work in that area is tight and sturdy by pressing on it with your hands. If you can find any sheet metal that is not firmly in place, you may be able to simply screw or nail it to an adjoining stud.
Also try to recreate the failure while watching and listening into this "hole". You might get a clearer idea where the source of the problem is.
Click to reply button
Inspiration banner


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button

To test the boundaries of small-footprint living, interior designer Jessica Helgerson moved her family to a 540-square-foo... Filling an underutilized area beneath the stairs is a smart way to save space. Doing so with a stash of wood, however, is ... The Audubon Society inspired wallpaper in this Adirondack-styled mudroom will get you in the outdoor mood. Grab your coat ... Chalkboard paint opens up endless possibilities for customizing your dresser time and time again. Use chalk to label the c... A fireplace in the bathroom creates the ultimate setting for relaxation. Homeowners often choose electric or gas over wood... This roomy boot tray made from punched metal stands up to all the elements. Station it in your mudroom or at your back doo... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... FLOR tiles are an affordable way to customize a carpeted floor covering for any space. Make anything from runners to wall-... Chalkboard paint features prominently in this elegant yet unpretentious headboard design. Add a new message daily to reflec... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... The indecisive homeowner need not fret over choosing one (or even two) cabinet colors. The kitchen cabinets in this artist... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... First dress up your metal shelves with a coat of paint in an accent color that complements your kitchen decor. Then arrang... Dark wood shelving and a matching upholstered bench keep this closet sleek and refined. The large window brightens the sub...
Follow banner a
Newsletter icon Flipboard glossy Facebook Twitter Pinterest Youtube Rss icon