Noise from the air return
FS
one of the air returns for my heat pump. The noise appeared after I
have been in the house for about 4 years.
Here's the facts:
1 - The sound appears any time the fan is running and the filter is in
place or something else is blocking air flow increasing vacuum.
2 - The sound disappears if the the opening is completely open. Lots of
fun for pinpointing the sound. The more vacuum the higher the pitch.
3 - Tracing the sound (I guess I can call it that) by ear definitely
has the loudest volume from that air intake (there are two). At the fan
unit in the basement the noise still appears to be from above.
4 - Most of the ductwork is encased by drywall.
Ive checked for anything loose and beat, banged and nailed hoping to
firm anything up, but Im out of ideas. I REALLY dont' want to tear out
walls.
Any suggestions would be appreciated,
Happy Holidays,
FS
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Before you buy.
Roger
installed. Turned out the air flow was causing the return air grill louvers
to vibrate which created an annoying 'humming sound'. I rolled a piece of
carpet underlay up and taped it with good old duct tape onto the inside of
the return air grill. The underlay pressed against the drywall and the
louvers - so that it kept the louvers from vibrating. That fixed the
problem.
Roger
"FS" <faint...@excite.com> wrote in message
news:83rqg8$g0u$1...@nnrp1.deja.com...
Bruce Birbeck
>
> I had a similar problem when our new furnace (with a higher speed fan) was
> installed. Turned out the air flow was causing the return air grill louvers
> to vibrate which created an annoying 'humming sound'. I rolled a piece of
> carpet underlay up and taped it with good old duct tape onto the inside of
> the return air grill. The underlay pressed against the drywall and the
> louvers - so that it kept the louvers from vibrating. That fixed the
> problem.
>
> Roger
>
And what did it do for the airflow of the system? It seems that you cut
down the volume of air moving through the grille.
--
BBB
Take out the NOSPAM to reply, unless it's already gone...
Ron Webb
the first stages of destruction. When a load is placed on the motor, the
noise from bad bearings may increase to the extent that they are audible.
--
R Webb
Ottawa, Ontario
rpw...@mondenet.com
rpw...@spam.mondenet.com
SkewedElf
paper roll to define the location of the noise by holding it to you're ear and
search that way
happy holidays
Elf
Larry Meile
the cold air return duct, am I right? If so, I had a similar problem
and it turned out to be the grille on the cold air return in one of the
rooms. What was strange is that it had run silently for years and then
started up out of the blue.
It was hard to pinpoint because the whole system reverberated from the
sound, kind of like an ethereal banshee. I identified it by
sequentially blocking off each return until I found the offending one.
The fix that worked for me was to slightly twist the grille vanes with a
pair of long-nosed pliers.
Let us know what you find.
Larry
FS wrote:
>
> Hi, I've got an annoying problem with a vibrating noise that comes from
> one of the air returns for my heat pump.
//snip/
>
> I've checked for anything loose and beat, banged and nailed hoping to
gh4g...@gmail.com
hrho...@att.net
> Hi, I've got an annoying problem with a vibrating noise that comes from
> have been in the house for about 4 years.
>
> Here's the facts:
> 1 - The sound appears any time the fan is running and the filter is in
> place or something else is blocking air flow increasing vacuum.
> 2 - The sound disappears if the the opening is completely open. Lots of
> fun for pinpointing the sound. The more vacuum the higher the pitch.
> 3 - Tracing the sound (I guess I can call it that) by ear definitely
> has the loudest volume from that air intake (there are two). At the fan
> unit in the basement the noise still appears to be from above.
> 4 - Most of the ductwork is encased by drywall.
>
> walls.
>
>
>
> Happy Holidays,
>
> FS
>
>
>
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.