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From: Adrian C on 7 May 2010 12:39
On 07/05/2010 14:19, jaugustine(a)verizon.net wrote:
> Hi,
>
> I bought a Whirlpool model AD50DSS2 dehumidifier. It is a very NOISY
> (vibration noise) dehumidifier!
>
> A service man came. He thought he fixed it, but later the NOISE was
> back.
>
> The dehumidifier's cabinet "amplifies" the compressor's vibration. A
> call to Whirlpool was no help at all.

Could it be possible to build a large baffle box about it using sheets
of MDF constructed so to avoid a direct path between the unit and
outside. Bit like constructing a large phat-box speaker cabinet with a
damping line? Obviously want to avoid the MDF getting wet.

Also, sticking sheets of bitumous deadening material on the case - sort
used stuck to automotive body panels - would probably help.

Finally, securing the compressor on anti-vibration mounts might be
possible, or improving the isolation it already has.

Also ...

I note this questions has been posted by the OP on many non-subject
related newsgroups and has had some similar answers, to which there has
been no response. I fear, but hope not, that he just wants to complain
and do nothing else.

The point is Radio Hams *don't* do nothing else. By their very nature,
they get right in there and tinker it, MODIFY it, even BEAT it - until
it works ....

--
Adrian C
From: William R. Walsh on 7 May 2010 13:03
Hi!

It seems that all new dehumidifiers are junk. I don't know. I have two
vintage units--one a Ward's Signature brand and the other a Sears
Coldspot--that are going on 40 years old now and still work perfectly.
(The Signature lost its low fan speed about ten years ago, but who
cares? Who would blame it? The Sears unit has only needed a new fan
motor...while the overflow cutoff is bad, it empties into a drain and
I don't care about the long defunct neon "full" indicator.)

As to your problem...check the rubber mounts on which the compressor
lives. There should be four or so between each "foot" of the
compressor and the frame of the unit. If those seem to be OK (and the
fasteners are reasonably tight), check the fan motor and its blades.
The motor could be loose or the fan blades might be hitting something.

If you can, try to run the unit with the cover or grille(s) off to see
what is making the sound. Exercise caution before touching anything
inside to see if you can change or eliminate the rattle.

William
From: jaugustine on 12 May 2010 13:10
Hi William,

I did not list the different methods I tried, starting with different
weights on top, insuring that everything is "tight" inside, checking
the rubber mounts used by the compressor, different small carpets
for it to sit on, and many other techniques.

My latest attempt, I used two boards with holes near each end and
long threaded rods (with nuts, flat & lock washers) through the holes in order
to squeeze the sides (boards against sides) of the cabinet. So far (one day),
it seems to work, but other methods I tried in the past seemed to work, but
only for a while.

Since this cold spell hit us, the dehumidifier is turned off. I will have
to wait until warmer weather comes back before I use it again. If this
latest technique works for at least two weeks, I will post an "update".

John


On Fri, 7 May 2010 16:35:18 +0000 (UTC), in sci.electronics.repair you wrote:

>William Sommerwerck <grizzledgeezer(a)comcast.net> wrote:
>> What about putting something heavy on the dehumidifier to dampen the sound?
>
>or jam some rolled up/folded cardboard wherever you can to make parts
>vibrate less. This hack works on machinery with vibrating panels or other
>parts that make noise even louder.

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